Hi, I recently got an exploding offer from a school (It's European, and thus not subject to the April 15th resolution). I'm happy with the offer, but I am waiting for interview results from other US schools as well. I reached out to those schools for an update, but they say they're unable to give an answer before the offer explodes. I'm trying to ask the European school for an extended deadline. What do you think is a good angle when writing my email? I'm worried I might sound like I'm likely to decline the offer if the deadline is extended.