Question

Is the following topic suitable for a research paper? Why or why not?

all the methods forensic scientists use to help solve crimes

No; it is too broad.
No; it is too narrow.
Yes; it is broad enough.
Yes; it is narrow enough.
No; it is not researchable.

Answer 1

No; it is too broad. is the correct answer

Answer 2

The correct answer is "No; it is too broad". Research papers are academic articles published by authors that perform an independent research. The topic "all the methods forensic scientists use to help solve crimes" is too broad, therefore it don't fit something that an author can perform as independent research. The topic fits to a different class of paper, called a Review paper.