What Is the Effect of Abstinence-Only Sex Education Programs

What is the effect of abstinence-only sex education programs?

A) They work very well: young people who take abstinence vows tend to keep them and to have incomparably low rates of sexually transmitted diseases.
B) There is no evidence that they work; rather, they spread misinformation and their participants have the same rates of sexually transmitted diseases.
C) While they do not tend to decrease rates of sexually transmitted diseases in their participants, they do an outstanding job of disseminating information about sexuality to young people.
D) They have almost no effect, positive or negative: studies show that teens nationwide ignore them altogether.