Fill in the blank (_) in the following sentence from the following choices.
Sentence: Derrick was a qualified teacher but Matthew was not as _ was indifferent to their profession.

Choice 1: Derrick was a qualified teacher but Matthew was not as Derrick was indifferent to their profession.
Choice 2: Derrick was a qualified teacher but Matthew was not as Matthew was indifferent to their profession.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2.