What is discretion? a. The right to inherent in a role to use any means to overcome resistance. b. The use of physical coercion to overcome the will of the individual. c. The unquestionable entitlement to be obeyed that comes from fulfilling a specific role. d. The authority to make a decision between two or more choices.

The authority to make a decision between two or more choices.

Explanation: The power or right to decide or act according to one's own judgment, freedom of judgment or choice is called discretion. Discretion is the authority to make a decision between two or more choices. Is is the power of free decision of choice within certain legal bounds.

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.        

the answer your looking for is c. : )