Direct object is the thing being acted upon. In this case, meal is the direct object of the "cooked" verb.
Answer:
The correct answer is letter "B": topic.
Explanation:
Topics are the central theme of studies, researches, books or speeches. A topic represents the main idea that is intended to be provided and from where all additional points of view depart. Usually, authors expose topics that are of their interest and that could be of interest to others.