Meaning: 'Caused' means to bring about or result in something happening.

Wrong options:

• was: The word 'was' is a past tense form of 'be,' which does not convey the action of leading to a result and does not fit the context of discussing an effect.
• supervised: 'Supervised' is a past participle that implies oversight or management, which does not relate to the cause-and-effect relationship being described here.
• equates: 'Equates' is a verb that means to be equal to, which does not fit as it does not describe the action of causing a drop in performance.
• scores: 'Scores' is a noun that refers to numerical results, which does not fit grammatically as it does not indicate an action.
• unrestricted: 'Unrestricted' is an adjective that describes a lack of limitations, which does not fit as it does not convey an action.

Correct answer: unrestricted

Explanation: The term 'unrestricted' is an adjective that describes the lack of limitations on the use of laptops or tablets. It fits grammatically and contextually as it indicates that students had full access to their devices without any constraints.

Meaning: 'Unrestricted' means having no limits or controls placed on something.

Wrong options:

• supervised: 'Supervised' is an adjective that implies oversight, which does not fit the context of allowing students to use their devices freely.
• scores: 'Scores' is a noun that refers to numerical results, which does not fit as it does not describe the nature of access to devices.
• behaviour: 'Behaviour' is a noun that refers to actions or conduct, which does not fit as it does not describe the access to devices.
• caused: 'Caused' is a verb that indicates an action leading to a result, which does not fit as it does not describe the nature of access.
• was: 'Was' is a past tense form of 'be,' which does not convey the idea of access and does not fit grammatically.

Correct answer: equates

Explanation: The word 'equates' is a verb that means to be equal to or to correspond with something. It fits grammatically and contextually as it describes the relationship between the percentage drop and the point drop on the scale.

Meaning: 'Equates' means to make equal or to correspond in value or meaning.

Wrong options:

• supervised: 'Supervised' is a past participle that implies oversight, which does not fit as it does not convey a relationship of equality or correspondence.
• scores: 'Scores' is a noun that refers to numerical results, which does not fit grammatically as it does not indicate an action or relationship.
• behaviour: 'Behaviour' is a noun that refers to actions or conduct, which does not fit as it does not describe a relationship of equality.
• caused: 'Caused' is a verb that indicates an action leading to a result, which does not fit as it does not describe a relationship of equality or correspondence.
• was: 'Was' is a past tense form of 'be,' which does not convey the idea of equality and does not fit grammatically.

Correct answer: behaviour

Explanation: The word 'behaviour' is a noun that refers to the way in which one acts or conducts oneself. It fits grammatically and contextually as it describes the potential change in professors' actions in response to students using devices.

Meaning: 'Behaviour' refers to the actions or conduct of a person or group.

Wrong options:

• supervised: 'Supervised' is a past participle that implies oversight, which does not fit as it does not describe the actions of professors.
• unrestricted: 'Unrestricted' is an adjective that describes a lack of limitations, which does not fit as it does not refer to the actions of professors.
• scores: 'Scores' is a noun that refers to numerical results, which does not fit as it does not describe actions or conduct.
• caused: 'Caused' is a verb that indicates an action leading to a result, which does not fit as it does not describe the actions of professors.
• equates: 'Equates' is a verb that means to be equal to, which does not fit as it does not describe the actions of professors.