Fill in the blank (_) in the following sentence from the following choices.
Sentence: Craig volunteered to help the dyslexic students at the school while Joel avoided them, since _ struggled with reading.

Choice 1: Craig volunteered to help the dyslexic students at the school while Joel avoided them, since Craig struggled with reading.
Choice 2: Craig volunteered to help the dyslexic students at the school while Joel avoided them, since Joel struggled with reading.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2. Since Joel struggled with reading.