Fill in the blank (_) in the following sentence from the following choices.
Sentence: Kenneth got better grades than Justin in every class, so _ offered to give some tutoring.

Choice 1: Kenneth got better grades than Justin in every class, so Kenneth offered to give some tutoring.
Choice 2: Kenneth got better grades than Justin in every class, so Justin offered to give some tutoring.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1.