Grover let Percy's mom "die" and was supposed to give Percy a safe passage to Camp Half Blood.
To me the answer is B because that one doesn't really sound right compared to the other answers.
This passage has a melancholic mood. You can tell this due to some specific key words: "dull", "dark", "soundless." They all have a negative connotation. The imagery of a lone rider in a dreary and dull country under the oppressive sky may clue you in that the overall passage has a sad tone to it. Even later in the passage the author states that the scene is melancholic.
A hyperbole is an exaggeration.
Any answer choices available?