Answer:
The researcher conducted experiments by using the scientific method.
Explanation:
It makes a little sense considering that the question did not elaborate further.
We need information so we know wrong from right. We also use information to make decisions and judgment calls. We use signs, common sense, or research via internet or books, etc.
I hope this helped and I would greatly appreciate if you could mark me as brainliest. Thank you, have a good day (:
The correct answer is C) Microphone. Hope this helps.
