Fill in the blank (_) in the following sentence from the following choices.
Sentence: Developing marketing campaigns came easy for Emily but not Carrie because _ had insufficient experience.

Choice 1: Developing marketing campaigns came easy for Emily but not Carrie because Emily had insufficient experience.
Choice 2: Developing marketing campaigns came easy for Emily but not Carrie because Carrie had insufficient experience.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2.