The correct answer is "Chicago."
Explanation:
If you don't know the meaning of a word, look up the definition. It helps a whole ton in English.
Adjective: "a word or phrase naming an attribute, added to or grammatically related to a noun to modify or describe it"
Hope this helps!
A.Class..........................................................................................................................................
Definitely A. B, C, and D have nothing to do with finding the main idea
Well you kinda do so yeah