Given below are two statements, one labelled Assertion (A) and the other Reason (R). In the light of the above statements, choose the most appropriate answer from the options given below:

Assertion (A):The effects of history in a social research study can be fatal

Reason (R):Various events that occur during a study may not affect the opinions and attitudes of respondents

ABoth A and R are correct and R is the correct explanation of A

BBoth A and R are correct but R is not the correct explanation of A

CA is correct but R is not correct ✓ Correct

DA is not correct but R is correct

Correct answer: (C) A is correct but R is not correct

Explanation

History effects can indeed be fatal to a social research study, but the reason wrongly denies that events sway respondents.

The assertion is correct, since outside events during a study can seriously threaten its internal validity.

History as a threat means external happenings occurring between measurements alter the outcome.

The reason is false, because such events do affect respondents' opinions and attitudes.

If those events had no effect, history would not be a threat at all.

Control or comparison groups help separate a history effect from the treatment's true effect.

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