Suppose that a poll is taken about how marriage partners relate to each other, and one of the ...

Suppose that a poll is taken about how marriage partners relate to each other, and one of the questions asked is if the person being interviewed has ever lied to his/her spouse. Can the responses to this question be trusted?
 
  A) Yes, because the question is very straightforward.
  B) Yes, because most people are inclined to answer truthfully in a poll.
  C) No, because people who have lied to their spouse would probably deny it.
  D) No, because the question is ambiguous.
  E) Yes, because the vast majority of marriage partners do not lie to their spouse.