Third epistemology besides empiricism and rationalism is pragmatism. It in fact represents a midway approach between empiricism and rationalism. As experiment and observation are made by researchers, they regard the importance of reasoning and the difference from rationalist experiments and observations-causes the change of belief and values of the human being which may be relative. For pragmatics emphasizing on the inextricability of theory and observation, there can be more than one theory at a time and the researcher can be forced to choose one of them. Moreover, pragmatism, as a different approach from other epistemologies, assumes that every belief or assumption is questionable and might change if necessary. According to pragmatism, our beliefs influence our actions directly and orientate them to a certain way. The correct option is E.