Fill in the blank (_) in the following sentence from the following choices.
Sentence: Megan gained a 3rd eye while Carrie was unchanged because _ used their spare time to meditate.

Choice 1: Megan gained a 3rd eye while Carrie was unchanged because Megan used their spare time to meditate.
Choice 2: Megan gained a 3rd eye while Carrie was unchanged because Carrie used their spare time to meditate.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1.