I believe the answer is C.
Answer:
(A) His need for revenge
Explanation: Montresors desire to punish fortunato affects his reliability as a narrator
Answer:
1. clearly, not clear
2. more pleasantly, not pleasant
3. empty, not emptily
4. quickly, not quick
5. often, not oftenly
6. special, not specially
7. regularly, not regular
8. really, not real
9. suddenly, not sudden
10. heavily, not heavy