Answer:
C. They can both function as nouns.
Explanation:
I calculated it logically
<span>B. It is taken from one solid primary source.
The method of researching is a systematic process of gathering, integrating, interpreting and presenting a collected data ruled out by the reliability and validity of the sources and elicited evidences.
A good topic should have come from a credible and solid primary source so that the study could be backed up from the former claims. </span>
Yeah it is possible to do that.
