Exogenous depression is usually caused by:
a. a biochemical imbalance.
b. traumatic events such as rape, assault, war, or airplane crashes.
c. external events such as the loss of something or someone of great value.
d. lack of adequate sunlight.

Effective communication consists of a. verbal and nonverbal communication and speaking clearly and loudly b. verbal communication and stereotyping c. verbal and nonverbal communication and active listening skills d. nonverbal communication and minimal interruptions   select the best answer from the choices provided.