Fill in the blank (_) in the following sentence from the following choices.
Sentence: She made an apple pie with a fresh crust, but it didn't taste good because the _ was rotten.

Choice 1: She made an apple pie with a fresh crust, but it didn't taste good because the crust was rotten.
Choice 2: She made an apple pie with a fresh crust, but it didn't taste good because the apple was rotten.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2.