He should have been able to answer at least two of those on the spot. Maybe three!
Definitely this one from Lindsey Graham:
GRAHAM: …would you work with us in terms of what regulations you think are necessary in your industry?
ZUCKERBERG: Absolutely.
GRAHAM: Okay. Would you submit to us some proposed regulations?
ZUCKERBERG: Yes. And I’ll have my team follow up with you so, that way, we can have this discussion across the different categories where I think that this discussion needs to happen.
GRAHAM: Look forward to it.
It’d be pretty hard to be more blatant about inviting corporations to write the laws that are supposed to regulate them - for the good of the citizenry, or course.