Fill in the blank (_) in the following sentence from the following choices.
Sentence: Ken sold his slippers for sneakers in preparation for marathon training as the _ offered more support.

Choice 1: Ken sold his slippers for sneakers in preparation for marathon training as the slippers offered more support.
Choice 2: Ken sold his slippers for sneakers in preparation for marathon training as the sneakers offered more support.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2.