Question

Which source would be most helpful in researching this question?

Answer 1

Answer:

The correct answer is A

Explanation:

In the age of technology, a documentary movie or series has  always been one of the most reliable sources of information that one could find.

Most of the documentaries that had been created throughout history were made with the help of the scientists or experts who excelled at a certain field that is being researched.

Thus, the most helpful source in researching this question would be

A)