Fill in the blank (_) in the following sentence from the following choices.
Sentence: Cynthia loved to go hiking in the mountains while Samantha thought it was boring because _ was somewhat athletic.

Choice 1: Cynthia loved to go hiking in the mountains while Samantha thought it was boring because Cynthia was somewhat athletic.
Choice 2: Cynthia loved to go hiking in the mountains while Samantha thought it was boring because Samantha was somewhat athletic.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1.