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.
Two countries what I’m so confused
Children would drift around the rooms like ghostly shadows
"All of a sudden..." is a transition that shows suspense. It says something happened, but it didn't happen with any warning and it doesn't tell the reader up front what went on or if it was good or bad.
