Explanation:
relative clause
it modifies noun phrase by some grammatical tools
example
my friend who is coming from America is coming to the dinner
here who is used to indicate the noun phrase
subject verb agreement
A subject and a verb must agree, even when other words or phrases come between them.
example
The flock of geese is flying south for the winter.
The subject is flock, so the verb should be is flying.
Answer:
The leaders believe that they should get more privileges than the laborers.
The passage states how the birthmark on Georgiana's cheek causes her to be "countenance even hideous" therefore the answer is B). the birthmark on Georgiana's cheek.
