I would say A. That's because in the answer choice B, it says "parents neglect their children" causing them to have lower self-esteem, which leads to meaning they think that causes teens to be easily influenced by peer pressure. I wouldn't say that would be a direct cause. Also, with answer choice C, it talks about "teens maturing at different rates". Different maturing levels may be a part of why teens are so easily influenced by peer pressure, because of the bigger kids may convince the smaller kids to do whatever they have in mind. I don't see that as being the best answer choice though. With option A, it talks about "rely more on their peers". I think that is very true. It's often to see teens trying to simply fit in or be accepted by their peers so that does a pretty good job at getting others to follow them.
