Fill in the blank (_) in the following sentence from the following choices.
Sentence: Christine paid a lot of money to Erin to navigate for the journey, because _ was a professional captain.

Choice 1: Christine paid a lot of money to Erin to navigate for the journey, because Christine was a professional captain.
Choice 2: Christine paid a lot of money to Erin to navigate for the journey, because Erin was a professional captain.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2.