Fill in the blank (_) in the following sentence from the following choices.
Sentence: When Donald filled out a form, Kevin took credit; then _ felt bad and apologized.

Choice 1: When Donald filled out a form, Kevin took credit; then Donald felt bad and apologized.
Choice 2: When Donald filled out a form, Kevin took credit; then Kevin felt bad and apologized.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
1.