A research which has a classroom approach is:
Correct answer is: B. Action
Action research focuses on solving problems in educational settings.
Here's a breakdown of the other terms:
Deism: Belief in the existence of a creator who does not intervene in the universe or the affairs of humans.
Atheism: The absence of belief in the existence of any gods or deities.
So, theism covers the belief in a single God, as in monotheism, or multiple gods, as in polytheism.