What does 「てつだう」 mean?

Answer and explanation

Correct answer: B. to help with a task

「てつだう」 means to help with a task.
Answer: to help with a task.
Why not the others: to cry: that is the meaning of 「なく」. to break (down): that is the meaning of 「こわれる」. to stop (by itself): that is the meaning of 「とまる」.

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