e4 or d4
The answer is e4, because d4 is illegal. The pawn will reach e5 and threaten you. If you capture the pawn, it will capture your queen, and you'd be exchanging 1 for 1 and 2 for 9, which I don't want. So that's settled!
But one thing: don't let them checkmate you in Chile or Argentina from now on. Don't move a piece you're not going to move.
But this is all you want to know from now on, because this is chess!!