What is an economic incentive? A. An economic regulation meant to limit risky economic actions
B. A reward designed to encourage specific economic behavior
C. An economic behavior that requires highly specialized technology
O D. An analysis of the costs and benefits of an economic choice

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

this question your asking is true hope this and you get a 100 percent : )

states grant a variety of local governments power to meet residents’ needs (source: apex learning). hope this !

answer; dr.black,who allows only certain individuals to mate;