I believe the answer is b. increased aggressiveness
(<240) in order to make a mark to the program directors or their clerks whom are reviewing their application. Passing with a low score is as good as failing as nobody will care about you unless you have connections which can help arrange for an interview in the program.
The most appropriate answer would be B. There is a behavioral phenomena in humans to avoid those they see as different, but also to avoid those who are known to be diseased regardless of the threat of infection. This can lead to social isolation for those with STI, if their condition becomes known to others.