Fill in the blank (_) in the following sentence from the following choices.
Sentence: Since the walls were thin, Donald could hear Joel's squeaky bed frame so _ yelled to him he was sorry.

Choice 1: Since the walls were thin, Donald could hear Joel's squeaky bed frame so Donald yelled to him he was sorry.
Choice 2: Since the walls were thin, Donald could hear Joel's squeaky bed frame so Joel yelled to him he was sorry.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
1.