Pretty sure it’s A. period
The word the adverb clause modifies would be "rang" just took the test hope this helps:)
Answer:
B OR A
Explanation:
If someone is speaking then B howevet, if it is just a statement then A
Answer:
Cat Valentine wanted to scare the puppy, but they were just too adorable.
Explanation:
Commas are meant to split the two ideas in the same sentence apart. Hope this helps