The correct answer is one is focused on concrete details in the text; the other is focused on ideas more subtly implied by the text
Explicit deals with details directly spoken, while inferential deals with infering, that is, some people incorrectly describe it as "what the author was trying to say".
I would go with D. If it’s a matter of bringing more audience to the reviews and making them engage more, media should definitely be used because it gives the readers a visual representation of what it is being reviewed.