The sentence suggests that the person is exhausted from the long trek and needs to rest to replenish and revitalize himself. Let's break down the options: A. repose: This is a synonym for "rest" or "relax," so it doesn't represent the opposite of "exhausted." B. remake: This option doesn't convey the idea of resting or rejuvenating. It is not the opposite of "exhausted." C. recuperate: This is the correct choice. "Recuperate" means to recover or regain strength after illness or exhaustion, making it the opposite of "exhausted." D. replace: This word does not convey the idea of rest or rejuvenation. It is not the opposite of "exhausted." E. rejuvenate: This is also a correct choice. "Rejuvenate" means to make someone or something look or feel younger, fresher, or more lively. It is similar to the idea of rest and revitalization but it is much more than that. So, C (recuperate) can be considered the opposite of "exhausted" in this context. Because recuperate explains how he needs to regain his strength after the long trek.