Question

Which additional word or words in the sentence should be capitalized?

Answer 1

All of them...!
D. because it is a name of a person.
C. because it is the name of a place (country)
A. and B. because it is the name of a place or thing (a proper noun!)
Hope this helps :)

Answer 2

they all should be capitalized. A,B,C,D are correct