Fill in the blank (_) in the following sentence from the following choices.
Sentence: Hiking is a favorite pasttime of Cynthia but not Natalie because _ had a longing to see a woodpecker.

Choice 1: Hiking is a favorite pasttime of Cynthia but not Natalie because Cynthia had a longing to see a woodpecker.
Choice 2: Hiking is a favorite pasttime of Cynthia but not Natalie because Natalie had a longing to see a woodpecker.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
2.