In Questionnaire Design,a Question Such As,"When Was the First Time

In questionnaire design,a question such as,"When was the first time you went to a dentist?" suffers from the problem of a question

A) that respondents cannot easily or accurately answer.
B) that respondents are reluctant to answer because the information is sensitive.
C) that steers respondents to a particular response.
D) that asks two questions at once.
E) that is complex and something respondents may be unfamiliar with.