Answer: "a country of varying ethnics and cultures."
Quildlen use of the term “mongrel” to describe American citizen refers to "a country of varying ethnics and cultures."
Answer: The market was busy and full of people selling words. There were crowds of people pushing and shouting. There were huge wooden wheeled carts.
D is correct because it was the beginning of the conversation and also because unlike C, when the guard shouted "or" it wasn't the start of the conversation but a continuation so it didn't need capitalization.<span />
Perhaps 'vocabulary'?
It is important to use vocabulary/terminology in a persuasive speech that the audience will understand.