The answer is C. realistic.
The first answer is correct (A).
A strong research requires, first and foremost, a questioning, a question that seeks an answer. The act of searching is driven by the search for answers. Necessarily, the scientific methodology suggests that the researcher has a hypothesis for that question.
This hypothesis is the guiding principle of the research, and is based on evidence and the researcher's experience and knowledge. However, finding the search answer may or may not confirm the hypothesis.
A claim of what you are going to talk about
-hope it helps my friend
