What is the definition of overflow in binary?

Overflow occurs when the magnitude of a number exceeds the range allowed by the size of the bit field. The sum of two identically-signed numbers may very well exceed the range of the bit field of those two numbers, and so in this case overflow is a possibility.

Ithink you should continue to put it in the rice or try to dry it with a hair blower or go to a phone repair place so they can get as much water out as possible, these may or may not work so sorry if it doesn’t

Ithink the answer is a.