Fill in the blank (_) in the following sentence from the following choices.
Sentence: William always sorted his recycling and garbage while Justin did not because _ didn't care to do his part to help the environment.

Choice 1: William always sorted his recycling and garbage while Justin did not because William didn't care to do his part to help the environment.
Choice 2: William always sorted his recycling and garbage while Justin did not because Justin didn't care to do his part to help the environment.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2.