The four safeguards of free enterprise are:

a. executive, judicial, legislative, and local.

b. corporation, partnership, sole proprietorship, and limited liability company.

c. private property rights, competition, the price system, and entrepreneurship.

d. socialism, capitalism, communism, and traditional.

C. Private property rights, competition, the price system, and entrepreneurship.

Explanation:

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.        

answer; extroversion;