Oberlin is participating in a psychology study in which he has to press a red button whenever he sees a circle on the computer screen and a green button whenever he sees a square. This study is measuring reaction time.

Of the following choices, which ones are characteristics of west african society? select all that apply. a. arabic was the main language used when trading with other societies. b. christianity was the only religion practiced in villages. c. slaves had no rights and were only given specific farming tasks. d. skilled workers were a higher level in the caste system than traders. e. religious rituals encouraged the honoring of ancestors.