Meaning: 'Necessarily' means 'as a necessary result' or 'inevitably,' suggesting that having to use print sources does not mean you must have the printed version.

Wrong options:

• aggressively: 'Aggressively' implies a forceful or intense manner, which does not fit the context of discussing requirements for sources.
• momentously: 'Momentously' refers to something of great importance, which is irrelevant in the context of accessing print sources.
• indecisively: 'Indecisively' means in a manner that shows uncertainty, which does not relate to the certainty of accessing print sources.

Correct answer: distinguishing

Explanation: The word 'distinguishing' is appropriate as it describes a key characteristic of print sources, emphasizing their unique feature of being available in printed form. This fits well grammatically and contextually within the sentence.

Meaning: 'Distinguishing' means serving to identify or set apart, highlighting the unique aspect of print sources being available in physical format.

Wrong options:

• brainwashing: 'Brainwashing' refers to a process of manipulating someone's beliefs, which is irrelevant to the context of print sources.
• refurbishing: 'Refurbishing' means to renovate or restore, which does not relate to the characteristics of print sources.
• establishing: 'Establishing' means to set up or create, which does not accurately describe the feature of print sources.

Correct answer: reliability

Explanation: The word 'reliability' fits grammatically and contextually as it refers to the trustworthiness of print sources, which is crucial when evaluating their credibility. It aligns with the overall theme of assessing sources.

Meaning: 'Reliability' means the quality of being trustworthy or dependable, particularly in the context of evaluating information from print sources.

Wrong options:

• compatibility: 'Compatibility' refers to the ability to exist or work together, which does not relate to the credibility of print sources.
• conductibility: 'Conductibility' refers to the ability to conduct electricity or heat, which is irrelevant in this context.
• susceptibility: 'Susceptibility' means being likely to be influenced or harmed, which does not fit the context of assessing the credibility of sources.

Correct answer: ensue

Explanation: The word 'ensue' is appropriate as it indicates that credibility does not automatically follow from being published in a print source. This fits grammatically and contextually within the sentence structure.

Meaning: 'Ensue' means to happen or occur afterward as a result, indicating that just because something is in print does not guarantee its credibility.

Wrong options:

• reassure: 'Reassure' means to restore confidence, which does not fit the context of discussing the automatic nature of credibility.
• ensure: 'Ensure' means to make certain, which implies a guarantee that does not apply here.
• issue: 'Issue' refers to the act of distributing or publishing, which does not relate to the concept of credibility.