Fill in the blank (_) in the following sentence from the following choices.
Sentence: Brett ended up getting promoted above William, because _ had a much weaker work ethic.

Choice 1: Brett ended up getting promoted above William, because Brett had a much weaker work ethic.
Choice 2: Brett ended up getting promoted above William, because William had a much weaker work ethic.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2. This is because the sentence states that "Brett ended up getting promoted above William," so the blank should be filled with the reason why