me and my fellow study mates are having a hard time with this question:

Question

Which of the following sentences is punctuated correctly?
A. My brother the valedictorian of his high school got into a very competitive college.
B. The chili, which had been simmering on the stove for hours, made the whole house smell delicious.
C. My cat who is almost fifteen years old is getting a bit of gray fur around his nose.
D. That toy helicopter which broke after only a few days was actually quite expensive.

I think it is B but my study mates think it is C.
Can you help us?

Answer 1

B is correct.

See #4 here:
http://guidetogrammar.org/grammar/commas.htm

Answer 2

Thank you so much! Have a fantastic rest of your day!
P.S. my study mates wanted to say thanks because now they see where they went wrong

Answer 3

Excellent!

And you're all welcome!

Answer 4

It was correct!! Thank you!
However is still got a bad grade (66.67)
But if your answer was wrong it would be lower so thx alot

Answer 5

You're welcome.

Here are two websites to use when you're studying English -- whether grammar or punctuation or writing or whatever. These are excellent! Bookmark them for future use. =)

http://www.chompchomp.com/terms.htm
and
http://guidetogrammar.org/grammar/index2.htm