I think B is your best shot here
A poem or song narrating a story in short stanzas, or also a slow romantic song.
I think the correct choice would be:
C) He had eaten too much; he felt dizzy.
The answer to your problematic question would indeed be the letter C.
The coordinating conjunction in the sentence is NOR.
There are only seven coordinating conjunctions. Remember the terms FAN BOYS in relation to coordinating conjunctions.
F - for
A - and
N - nor
B - but
O - or
Y - yet
S - so
Coordinating conjunctions connect words, phrases, and clauses. Giving equal emphasis on two main clauses.
Here are the patterns for using coordinating conjunctions:
1) connecting two main clauses
main clause + coordinating conjunction + main clause
2) connecting two items
item + coordinating conjunction + item
3) connecting three or more items in a series
item + item + coordinating conjunction + item