Fill in the blank (_) in the following sentence from the following choices.
Sentence: Angela found it very rewarding to help Christine with their homework, which made _ feel thankful.

Choice 1: Angela found it very rewarding to help Christine with their homework, which made Angela feel thankful.
Choice 2: Angela found it very rewarding to help Christine with their homework, which made Christine feel thankful.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2.