What is the meaning of the capitalized word in the sentence?

He injured his ANKLE while playing soccer.
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A. A bone in the leg.
B. The muscle in the leg.
C. The joint between the foot and the leg.
D. A ligament in the leg.

Answer: (C)

Solution: 
In the context of the sentence, the word “ANKLE” refers to the joint that connects the foot and the leg. The other options (a bone in the leg, the muscle in the leg, a ligament in the leg) are not accurate meanings for “ANKLE” in this context and can be eliminated.