I'll give you a question, please answer with step-by-step reasoning process.
He told the wild child that it would eventually run out of steam, and he promised to the child what?\nOptions:\n- work hard\n- quitting\n- candy\n- you'll sleep\n- rest

you'll sleep
If we run out of steam, we tend to sleep.

When something is boring, we feel less enthusiastic and hence feel sleepy.

.

The answer is you'll sleep