The correct answer is -ic.
When you add the suffix -ic to the root phon, you get the word phonic, which means 'something that has the characteristics of sound.' If you add the suffix -al to phon to create phonal, it means something related to sound, which is not the exact same meaning (so that is a wrong option).
Words phonen and phonly don't exist, so -en and -ly are wrong options as well.
Answer:
C). Social desirability.
Explanation:
Social desirability is demonstrated as the kind of response bias in which the respondents' tendency of answering questions in a particular manner is considered advantageous by others.
In the second paragraph, the last statement explains how research proposes how 'the response over the internet is advantageous over other types of telephonic surveys or direct(face-to-face) interviews. The respondents are likely to provide socially admissible and authentic answers regarding sensitive topics like weight more during a telephonic or face-to-face interview than on internet. This shows the comparison aptly and the difference in social desirability on internet responses and the other responses. Thus, <u>option C</u> is the correct answer.
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