I say it's B but I might be wrong
Answer:
What story
Explanation
B. chicken and dumplings
It's because the 'chicken and dumplings' is renaming the noun 'meal' that is already there. Usually to find an appositive phrase, just look beside the noun and see if the sentence works without the words beside it.
The answer is C.my school is the oldest in our town,and it is three stories high