What is reinforcement learning?

SELECT THE CORRECT ANSWER

A. It is a type of machine learning used to learn models from labeled training data.

B. It is a type of machine learning that allows the learning system to observe and learn the ideal behavior, based on trying to maximize some notion of cumulative reward.

C. It is a subset of machine learning used to extract inferences from data sets that consists of input data without labeled responses.

D. None of the above