Please read the sentence
Many blamed relationship problems or lack of close relationships stemming from their mental health problems as a _______ cause of isolation.
a. main b. sole c. top
The key is 'c'. According to the explanation 'a' and 'b' can only be used with 'the'. Is that correct?
Looking forward to hearing from you.
Thank you in advance.
It is sort of correct, as main and top are normally superlatives, but they can be used in the other way, if we can accept two or three main causes, or if we can say there are two or three top causes. In American English, we do use main and top in this way, and so none absolutely requires the definite article here, in my view.
Thank you very much for your explanation. Now I see.
Originally Posted by konungursvia
Looking at it again, I feel the answer should be B rather than C, according to the logic given. However, it doesn't really matter, as long as you understand the reasoning.