@murphy.matt.j you're the GOAT for this explanation. I was having the same question and your explanation was so insightful!

You are confusing the sufficient/necessary relationship which can lure you into trap answers. Here are the lessons to understand why if C is true, A does NOT mean that it is true:

https://7sage.com/lesson/sufficiency-and-necessity/

https://7sage.com/lesson/confusing-sufficiency-for-necessity/

$69 per month and no videos throughout some of the most relevant topics? It is hard to recommend this course to someone when videos only exist for 1/3 of the course. :(