I believe the answer is Corpus delicti but I'm not certain.
I believe the answer is: somewhat more
When a person make a public virginity-until-marriage pledge, they tend to be more likely to feel some sort of social pressure to follow on their words in fear of being seen as a hypocrites by other peers. This would indeed improve their likelihood to stay a virgin, But the effect of the social pressure tend to diminish over time
The following is missing for the question to be complete:
A. Identity diffusion
B. Identity moratorium
C. Identity foreclosure
D. Identity achievement
Answer: C. Identity foreclosure
Explanation: Identity foreclosure is characteristic of adolescence, that is, in young people who have an identity but all ideas and traits the young person has just picked up from their parents, friends, group. Young people in this age have a pronounced identity, and are prone to discover their own identities, but also a tendency to receive various influences first of all family and then environment. In other words, young people in this age, are still not exploring other opportunities and ideas, but are adopting established patterns.
The combination of the emphatic need to explore one's own identity in adolescence and the established characteristics of family and society creates this psychological phenomenon. Identity foreclosure is, in fact, a consequence of a pronounced desire to discover one's identity, but when adolescents are still unsure of who they are, what their true traits and aspirations are, they can then adopt someone else's, from a close environment, ideas and traits for which they think they are theirs.
In common usage, vegetable oil may refer exclusively to vegetable fats which are liquid at room temperature. Vegetable oils are usually edible; non-edible oils derived mainly from petroleum are termed mineral oils. Hope it answered your question :D