Fill in the blank (_) in the following sentence from the following choices.
Sentence: Maria treats and teaches people like Carrie about the value of good health, _ is a doctor.

Choice 1: Maria treats and teaches people like Carrie about the value of good health, Maria is a doctor.
Choice 2: Maria treats and teaches people like Carrie about the value of good health, Carrie is a doctor.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1.