Fill in the blank (_) in the following sentence from the following choices.
Sentence: Carrie didn't want to have a baby with their partner, but Mary did. _ always took birth control to prevent pregnancy.

Choice 1: Carrie didn't want to have a baby with their partner, but Mary did. Carrie always took birth control to prevent pregnancy.
Choice 2: Carrie didn't want to have a baby with their partner, but Mary did. Mary always took birth control to prevent pregnancy.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1.