Answer:
The correct sentence is: "What snacks are you going to get at the movie tonight?" asked William.
Explanation:
It is all based on the puncuation of it and the quotation marks. Whatever someone is saying needs to be in "quotation marks" after a quotation mark does not need to be capitalized like Asked, it needs to be lower case. The name however does need to be capitalized because it is a proper name.
Hope this helps!
