Which of the following is an example of a bad research question?

Which of the following is an example of a bad research question?
A) Do students attending high schools that offer sex education have lower teen pregnancy rates than those schools that do not?
B) Is premarital sex immoral?
C) Do teens who begin to engage in sexual relations when they are younger than 15 have lower self-esteem than teens who wait to begin until they are over 18?
D) Does an absence of reliable birth control information increase the chances that sexually active teens will catch and spread sexually transmitted diseases?
E) Does the age at which young men first engage in sexual intercourse differ among those who live in rural areas, small towns, suburbs, and large cities?