The correct answer is C. Adjust
Explanation:
In language, the context of a word includes the words, phrases or sentences surrounding the word that determine the meaning of the word. In the case of the word "acclimate" this word is used in the sentence "John had a difficult time trying to acclimate to his new school at first" that explains John could not adapt or adjust to his new school. Also, this is supported by subsequent sentences that explains after a few weeks John's classmates stop making negative assumptions about him. This implies, in this context the word "acclimate" means to adjust, adapt or fit into a new place.
