A Learner Asks a Question, and the Instructor Provides an Answer

A learner asks a question, and the instructor provides an answer. The learner's face immediately shows signs of confusion. Which of the following is the BEST approach the instructor should take?

A) Verbally confirm the learner understands and provide another explanation
B) Provide the same answer and ask if the learner understands
C) Wait for a couple minutes to determine if the learner comprehends the answer
D) Ignore the look on the learner's face and move on to the next point