Fill in the blank (_) in the following sentence from the following choices.
Sentence: Carrie was afraid of ghosts. Christine said this was foolish but _ could not convinced them.

Choice 1: Carrie was afraid of ghosts. Christine said this was foolish but Carrie could not convinced them.
Choice 2: Carrie was afraid of ghosts. Christine said this was foolish but Christine could not convinced them.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
1.