Which of the following reasons given by teenagers for not using contraceptives would be least ...

Which of the following reasons given by teenagers for not using contraceptives would be least likely?
A) "I don't know when I should use protection because I don't really understand if I'm most likely to get pregnant right before my period, right after my period, or sometime in between."
B) "I'd be too embarrassed to ask my doctor about getting the pill and the woman who works at the drug store is my mom's friend!"
C) "I would use birth control, but I'm concerned about the possible side effects."
D) "Getting pregnant is something that happens to other people, not to me!"