Aresearcher who becomes a police officer in order to better understand factors contributing to police officers' stress level and coping skills is utilizing which type of research method?

In which research method does a researcher change the value of one variable to determine how the change affects another variable? a. experiment b. observational research c. survey d. case study

U.s. foreign aid incudes all the following programs excepta. humanitarian aidb. military assistancec. cycle of dependency grantsd. development aid

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.