Dr Boissoneau Is a Well-Liked Professor, and Students Always Say

Dr. Boissoneau is a well-liked professor, and students always say that it is very easy to remember his lectures. Dr. Boissoneau uses a lot of funny pictures to illustrate his points (like a picture of Napoleon being soaked by a bucket of water, when discussing the battle of Waterloo) and he creates all kinds of examples and metaphors when explaining theories or concepts (like comparing Marie Antoinette to Paris Hilton) . What is it about Dr. Boissoneau that is most effective for helping students to remember his lectures so easily?

A) Students don't necessarily remember more of the lectures, but they find the lectures entertaining so they feel like they're learning more.
B) He uses examples to enhance elaborative coding, which is more complex than visual imagery and results in better recall.
C) According to dual-coding theory, memory is enhanced by both visual and semantic codes, since either can lead to recall.
D) He uses visual imagery, which is more salient than semantic elements like metaphors.