A) All nouns should be capitalized. I pick A.
B) The second choice is wrong because "house" don't have to be capitalized. It is not a noun. And also "movie" doesn't need capitalization.
C) The third choice is wrong because "movie" don't have to be capitalized.
D) So many erros.
A noun is a name of a person, animal place or thing.
Answer:
a. chain communication network is most appropriate.
I don't think that you finished writing the question
