Because who ever the person is may think that there peers (friends) might not want to be friends with them if they don't do what all or some of them doing
The answer to this question is the third statement which is "innate ideas exist because we are all born with them". Although there are some philosophers who disagree with this concept. Innate ideas are ideas that are inborn. We have already this idea even we don't have experience.
I would say that the correct answer is B, concerned. A doesn't apply, he isn't really preoccupied with something over something else, and C doesnt completely make sense with the passage. And Tom isn't horrified, he doesn't seem to be reacting too much at all, other than just seeming concerned.
They tend to be facing a social dilemma. For example, a real world example would be one person against human rights, animal rights or something stereotypical.
This is an example of a linking verb