Answer:
The reader will feel the tension immeditaely after just starting to read, allowing questions and tension to form so the reader will question about what happens before the action. By the way, in media res is when the author starts the story in the middle instead of the beginning.
Explanation:
The answer is A. By dependent marker do you mean dependent clause?
C. the word Have shows you it is past tense but it does not end in ed so it is no a past participle.