An Instructor Is Presenting a Technical Class Through a Virtual

An instructor is presenting a technical class through a virtual classroom. The instructor provides an essay question for the learners to verify the comprehension of the topic and asks for the answers to be posted to the instructor in private chat. After a few minutes, learners begin sending in their answers and all the responses are identical. Which of the following methods of evaluation would have been BEST to utilize in this situation?

A) Various questions to each learner individually
B) Ask probing questions to individual learners
C) Use an online multiple choice exam
D) Perform a survey of the class and the understanding of the topics