Dr. Kelly Earls, a neuropsychologist, was sitting next to an individual on a train who was exhibiting uncontrollable movement. Dr. Earls assumed that this individual had an imbalance in which of the following neurotransmitters?

Temperaments fluctuate dramatically over time

Indicate whether this statement is true or false.

Brian is struggling with himself. He's always been a good student, but lately his grades have been slipping a little bit. He feels like he has nothing in common with those who were once close friends, and yet he doesn't seem to "fit in" with any other crowd. He will be finishing his degree in history next year, but lately, he's been wondering whether he really wants to be an historian (and he feels silly that he's wasted so much valuable time on something that he might not even want to do for the rest of his life). His girlfriend wants to get married after graduation, and he had planned to give her a ring over winter break; however, lately he's been feeling like marriage should wait.

He wants to have time to explore the world and "discover" himself before settling down. Brian seems to have a(n) A) superiority complex. B) generativity complex. C) identity crisis. D) defeatist attitude (d-crisis). E) ecological crisis.