The correct answer is 15,000 people.
You can't really justify anything but dramatic irony.
It isn't foreshadowing. She is genuinely weeping and it has nothing to do with future events
There is no allusion in this. Her crying is not symbolic. Nor does it refer back to anything
An oxymoron is a contradiction that seems false or unrelated but isn't. Her weeping is genuine. You might be able to make a case for this but dramatic irony is much better: Juliet's mother thinks one thing, the audience knows another.
It limited Executive Privilege, which was the ability of the president to withhold confidential info for national security reasons.