After observing a moth that is camouflaged against dark-colored bark, a scientist asks a question. the scientist discovers that the question has already been asked and answered by several investigations. what should the scientist do? the scientist should test the question anyway.
the scientist should broaden the scope of the question.
the scientist should come up with a new way to test the question.
the scientist should revise the question to address a gap in knowledge.

The scientist should revise the question to address a gap in knowledge.

Explanation:

A research question is a scientific inquiry that is required to be answered using suitable methodology.

Among the options given, The scientist should revise the question to address a gap in knowledge. is the correct option. This is because of the fact that analyzing and finding the possibilities in the question again the scientist can add new facts in the question which have not been found out by the research conducted by the several scientists earlier. This will lead to the increment in the knowledge related to the research topic.

magnitude and direction