Meaning: 'Originate' means to begin or come from a particular source, indicating that heart disorders stem from reduced or blocked blood flow.

Wrong options:

• vary: The verb 'vary' suggests differences or changes, which does not accurately describe the cause of heart disorders in this context.
• receive: The verb 'receive' implies acceptance or obtaining something, which does not relate to the cause of heart disorders.
• exempt: The verb 'exempt' means to free from an obligation or rule, which does not apply to the context of heart disorders.

Correct answer: them

Explanation: The pronoun 'them' correctly refers back to 'arteries,' maintaining grammatical consistency in number and context as it indicates the accumulation of cholesterol and fat in those arteries.

Meaning: 'Them' is a pronoun used to refer to previously mentioned plural nouns, in this case, 'arteries.'

Wrong options:

• those: 'Those' is a demonstrative pronoun that would require a different grammatical structure, making it less suitable in this context.
• their: 'Their' is a possessive pronoun that does not fit here as it would imply ownership, which is not the intended meaning in this sentence.
• there: 'There' is an adverb indicating a place, which does not relate to the context of referring to arteries.

Correct answer: employ

Explanation: The verb 'employ' is appropriate as it means to use or apply a method, fitting grammatically in the present tense and contextually as it describes the action a doctor takes to predict heart attack risk.

Meaning: 'Employ' means to make use of something, in this case, a statistical model for predicting risk.

Wrong options:

• present: The verb 'present' implies showing or introducing something, which does not accurately describe the action of using a model in this context.
• suggest: The verb 'suggest' implies recommending an idea, which does not convey the action of using a model for prediction.
• propose: The verb 'propose' means to put forward an idea or plan, which is not as precise as 'employ' in the context of using a model.

Correct answer: access

Explanation: The noun 'access' fits grammatically as it indicates the ability to obtain or make use of something, aligning contextually with the idea of having the necessary records for evaluation.

Meaning: 'Access' refers to the ability to reach or obtain something, in this case, medical records.

Wrong options:

• right: The noun 'right' does not fit contextually as it refers to correctness or entitlement, which does not relate to obtaining records.
• potential: The noun 'potential' implies possibility but does not convey the idea of obtaining records, making it unsuitable here.
• room: The noun 'room' refers to physical space, which does not relate to the context of accessing records.