What is the most effective type of research question?

B. a question that is challenging and does not have one correct

Explanation:

A research question is a question that guides the process of researching or finding information from multiple sources to prove or disprove something, because of this, effective research question should allow the researcher to engage in the process of researching which implies they should never be too simple or answered by using common sense. Instead, an effective research question is one that is challenging, probably controversial and one that does not have one correct answer but multiple answers which allows the researcher to look for multiple sources of information and find suitable answers based on the comparison of the information found and then report the results of all the process. Therefore, the most effective type of research question is a question that is challenging and does not have one correct.

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Explanation:

What makes a research is usually a problem we are trying to solve and it's problem is or something seen as a percieved problem with imminent consequences if it's not well eradicated. Therefore it would be one that relates to our survival or our easier way to doing things.

this is more of an opinionated response

explanation:

answer it yourself

i think the life is invaluable.

you can also say immeasurable.