Answer:
A). Ask verifying questions.
Step-by-step explanation:
As per the question, 'asking verifying questions' would be a significant idea to test one's own understanding of the concepts during a discussion as these questions would assist in remembering the points associated with the concept more easily and effectively. These questions would check that how successfully one has understood the concepts which were discussed during the discussion and the efficacy in answering these questions would also reveal their individual interests and learning ability. In an attempt to answer these questions, the individual is able to regularly reiterate the ideas discussed that would promote the ability to make reference. Thus, option A is the correct answer.