Answer:
The answer is C I believe.
The one that has the correct punctuation is the second option : "More and more teenagers are being diagnosed with type Ii diabetes" said Mrs. Allen, our school nurse
After quotation mark, you shouldn't use capital letter and you shouldn't use comma before the second quote
hope this helps
I recall taking a test with that question in it , i believe they were giggling? when they heard her coming down the hallway, the answer would be giggling..