Because the refrigerator door seal is mostly made of plastic and plastic, it has certain plasticity. So you can use a ruler to draw a line on the inside of the seal, and use a blower to heat the bent part slightly until the plastic is slightly soft. After the refrigerator door seal is cooled, the ruler can be pulled out to restore the door seal to its original state, so it can be shaped and corrected by hair dryer heat setting method.

So the AB option is wrong and the c option is correct.

So choose C.