Why is this a scientific question?

“do people perform better on exams when they wear their favorite color? ”

Correct answer choice is:

A scientific question is a problem that may point to a hypothesis and support us in solving the cause for any research. A good scientific question has several aspects. It should have any true results, should be testable.

A systematic process is usually intimately connected with the decisive study. In common, the purpose of a systematic process is viewed as a mechanism of control directed at decreasing the number and austerity of errors, omissions, and failures due to both human or technological functions associated.

  the common sense as a pamphlet written by thomas paine. it promoted the independence of the colonies from british rule. the distribution of this pamphlet was great, it reached people everywhere and it was even read aloud at places people met. it also unite the colonists before the revolutionary war.

answer is d