Ok so i just found out the right answer. I know im probably really late, but at least any future people will have it! so its b and c because a colon can only correctly be used after a complete sentence and b and c are the only correct uses of a colon. also d couldnt be right because thats a semicolon not a colon and they have different rules for a semicolon.
I'm sure you already finished it, but to anyone who needs it
The order is:
1
3
2
I just did it :)
