Fill in the blank (_) in the following sentence from the following choices.
Sentence: Steven thought twice before expressing his discomfort aloud, Michael seemed so happy, _ didn't need to know that.

Choice 1: Steven thought twice before expressing his discomfort aloud, Michael seemed so happy, Steven didn't need to know that.
Choice 2: Steven thought twice before expressing his discomfort aloud, Michael seemed so happy, Michael didn't need to know that.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2.