Erikson used the term __________ to describe the trouble adolescents experience in forging an identity.

A) moratorium
B) ego crisis
C) identity crisis
D) stagnation

Erikson's theory proposed that adolescence is a time of identity crisis, encompassing a period of exploration and experimentation in which one tries to establish a coherent sense of self. The term "moratorium" describes the temporary suspension of one's involvement in the standard roles and responsibilities of society in order to pursue identity formation. "Ego crisis" is a term used more broadly to describe any challenge to one's sense of self or self-concept. "Stagnation" is a concept from Erikson's later stages of adulthood, referring to a lack of personal growth or feeling stuck in one's current life situation. Therefore, the best answer is C, identity crisis.