I think the answer is sentence two it doesnt really have anything to do with this article or paragraph
The comma would end up between but and orange.
"You may have an apple or an orange, but you can't have both."
This is because you're coming to a conjunction, which usually has a comma preceding, or coming before, it.
Answer:
The authors purpose is to inform people on Last year's Newburgh Film Festival and give them the information they need if they are planning to attend
Explanation: