Answer:
A. 37.
Step-by-step explanation:
In B, that is making a withdrawal.
In C, because of the *||*s around it, this means that the number <u><em>inside</em></u> of those lines will always be positive. But the negative is outside of the lines so it is still negative.
In D, you might think that the |-37| cancels out the - on the outside. But like I said, those lines mean that anything <u><em>inside</em></u> of the lines will always be positive. Meaning that the |-37| inside just becomes |37| and still turns negative because of the - on the outside.
Hope this helped, the detailed explanation took a minute! :D