In order to provide a thorough presentation of a topic, a research question must
a. be broad in scope.
b. be about a current issue.
c. appeal to a varied audience.
d. have more than one main idea.

The answer is DEFINITELY  "B". It is B because when you have a research question you are researching about an issue that is occurring in the world such as police brutality, the Trump presidency, etc, this is why you do research so you can learn more about the topic and ultimately form your own opinion about the topic, when you create a research paper you would almost always have you argument  (which is your opinion on the topic) and a counterargument (which is an argument that goes AGAINST your argument), a paper wouldn't be right without a counter argument because it would seem as if you are saying that your opinion is the only valid opinion. When you add your counter argument you are stating that even though other people might say THIS about the topic they would be wrong because of THIS 

I HOPE this the questins thank you