I would say number "A" is correct. If you read all of them out loud, pausing for each comma/semicolon, you might notice that "A" and "B" sound the most reasonable. It may depend, but I would go with number "A" because the semicolon makes a bit more sense than a comma. It can be tricky to identify the difference sometimes. I hope this helped :)
Did you find the answer by any chance
Theme:
the subject of a talk, a piece of writing, a person's thoughts, or an exhibition; a topic.
Hope this helps!
She did because she wanted too
