It depends on the kids! However, in general, involving the students in making it- like a student council or something, gets them to promote it to their friends as well. Other ways are to have them come up with and vote for themes they'd want, so that they're actually excited about them. As for food drives, there could be a small incentive tied together with donating, like a small keychain or something.
I hope this helps!
I would say that B makes the most sense. You cannot experience new cultures unless you travel away from where you are from. Hope this was helpful!
