The word "either" is a correlative. The answer is D. This is because a correlative conjunction connects two nouns and ideas that relates to each other. Either uses "or" so it connects two choices in one situation.
They should be taught to cook for wealthy families.
Hope thats right :/
I think its 'We had it worse than everyone on the first floor,all the windows in all the upstairs rooms were tinted; and there wasn't enough moonlight in the first place.'