All of the following are guidelines for the kinds of questions a questionnaire should avoid EXCEPT:
a. Do not use overstated questions that use words that overemphasize the case.
b. Do not use tough questions.
c. Do not use leading questions.
d. Do not use double-barreled questions, which ask two questions at the same time.
e. Do not use loaded questions that have emotional overtones.
Answer: b. Do not use tough questions.