Fill in the blank (_) in the following sentence from the following choices.
Sentence: Lawrence asked Kenneth for his help in passing the BAR exam this time because _ didn't study.

Choice 1: Lawrence asked Kenneth for his help in passing the BAR exam this time because Lawrence didn't study.
Choice 2: Lawrence asked Kenneth for his help in passing the BAR exam this time because Kenneth didn't study.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
2.