I believe the answer is C) frightened. A participle is a word formed from a verb, and used an an adjective or a noun. Since frightened and climbed are both verbs, that narrows it down to either C or D. From there, frightened is an adjective, while climbed is nor an adjective or a verb.
1. Wake
2. Slept
3. Didn’t wake
C. Follow ur.passion. it's better to do what you want to do than let others tear you down