The Cossack was the cat; he was the mouse. Then it was that Rainsford knew the full meaning of terror.
Explanation:
The detail from the excerpt of "The Most Dangerous Game" that best supports the idea that Rainford experiences the fear of a hunted animal while in the jungle is this one. Rainsford feels like a mouse being hunted by a cat. This detail explicitly states that he feels terror. It captures both the terror and feeling like a hunted animal.
I think that the answer is B b/c the first and last answer make no sense and it says that he walked in a buzz of excitement which made me think of choice b