ECONOMICS: Economists make assumptions in order to a. Minimize the likelihood that some aspect of the problem at hand is being overlooked.
b. Focus their thinking on the essence of the problem at hand.
c. Minimize the number of experiments that yield no useful data.
d. Mimic the methodologies employed by other scientists.

I think that it might be B, but if someone could please double-check. No fake answers. Thanks in advance! :)

Asociologist wants to study a culture that occurs in some women’s prisons: “state families,” in which individual prisoners take on certain roles within a group of like-minded prisoners. there is previous evidence that younger prisoners will use older inmates who play the roles of grandparents as a resource before they will turn to staff for and advice. the lieutenant in charge of a dorm of long-term prisoners offers to gather volunteers to speak to the researcher and also offers to vouch for the integrity of the researcher. the use of this staff is: a valid use of a statistical technique referred to “snowball sampling” wherein the inclusion of the first subject leads to the recruitment of another one subject.a useful tactic in obtaining a sample of prisoners who both meet the criteria and who will be honest with the researcher.wrong and is prohibited; subject selection needs to be free from intervention by prison authorities or prisoners.acceptable only when the researcher’s irb grants a special waiver.

If both the president and the vice president can no longer serve, who will become the next head of state?

This cartoon appeared in 1916. the topic of the cartoon isa)the reason for the start of world war i.b)the success of us submarines in world war i.c)the military alliance between germany and mexico.d)the attitude in the us towards submarine warfare in world