I think the answer is World war 1 or 2 I am not sure because the Harlem Renaissance began in 1920.
Answer: "It's a dog" and "Who's that?"
Explanation:
The comma is putting together and shortening 'it is' and 'who is'.
The correct answer is D. simple.
A simple sentence contains only one independent clause. If a sentence has more than one independent clauses, then it's called a compound sentence. If it has one independent clause, as well as one (or more) dependent clauses, then it is a complex sentence. A run-on sentence is a grammatically incorrect sentence which combines two or more independent clauses with a comma only, rather than with a conjunction.
It effects everyone because their is no currency to spread around, to trade, or to buy stuff.