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.
Answer:
invent qualities to describe in detail
Answer:
i cant see the site it says unable to open sorry ;(
Explanation: