Fill in the blank (_) in the following sentence from the following choices.
Sentence: Sarah always did well in English class during school but Christine didn't because _ loved writing.

Choice 1: Sarah always did well in English class during school but Christine didn't because Sarah loved writing.
Choice 2: Sarah always did well in English class during school but Christine didn't because Christine loved writing.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
2. Sarah always did well in English class during school but Christine didn't because Christine loved writing.