Fill in the blank (_) in the following sentence from the following choices.
Sentence: Christopher was very dramatic but Joseph was very calm so _ smiled when the ice cream truck came.

Choice 1: Christopher was very dramatic but Joseph was very calm so Christopher smiled when the ice cream truck came.
Choice 2: Christopher was very dramatic but Joseph was very calm so Joseph smiled when the ice cream truck came.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2.