Many researchers searching for the cause of chronic fatigue syndrome believe that it can be brought on by a combination of viral infection, psychological stress, and _____.

__________ differences exist between different American ethnic groups in education achievement.

A. No B. Minimal C. Sharp D. Few

The 2 main objectives of I/O psychology are:

a. conducting research and applying research knowledge to improve work behavior b. training other psychologists and designing organizational structures c. conducting research and training other psychologists d. counsel managers and promote workers