Answer:
C. To start with dramatic action
Explanation:
To answer this question, it is important to first understand what medias res is. "Medias res" is the Latin term for "in the middle of something." So, if a story starts in medias res, then it is beginning in the middle of the action. This type of storytelling tends to skip the exposition and save it for later. Famously, many epics such as the Oddessey begin in medias res.
Authors do this to give the readers dramatic action. This action and form of storytelling are intended to hook the reader with interesting plot points before getting into background information.