Use context clues within the sentence to identify the definition of bold faces words

beacsue he wanted to play baseball so badly his face was crestfallen
A rebellious
B determined
C dejected
D incredulous

C dejected

The definition of the bold-faced words can be identified by considering the context clues within the sentence. In this case, the sentence says "because he wanted to play baseball so badly his face was crestfallen." The phrase "his face was crestfallen" implies that the person's facial expression was sad and disappointed. Based on this context, the definition of crestfallen is most closely related to option C dejected, which means feeling sad, disappointed, or discouraged.