Answer and explanation

Correct answer: B. to put on (shoes, trousers)

「はく」 means to put on (shoes, trousers).
Answer: to put on (shoes, trousers).
Why not the others: to quit, to stop doing: that is the meaning of 「やめる」. to return (something): that is the meaning of 「かえす」. to rescue: that is the meaning of 「たすける」.

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