It is useful for a researcher to offer the"don't know"option with questions that require mental effort in order to reduce:
A)Item breakoffs.
B)Item cheating.
C)Item omissions.
D)Refusals to participate.

Question

Quizplus · Accepted Answer

Offering a "don't know" option can help reduce item omissions by providing respondents with an alternative when they are unsure of an answer, thus encouraging them to complete the question rather than skipping it.

It Is Useful for a Researcher to Offer The"don't Know"option