Which of the following sentences uses concrete language?

Question

A. Jerry saw that the glass was really dirty.
B. I met Cathy at a store on a street near the bridge.
C. Danny's Labrador retriever eagerly chases tennis balls.
D. When I saw Susan, she was reading a book.

My answer is D

Answer 1

I think there's a better answer.

http://grammar.ccc.commnet.edu/grammar/composition/abstract.htm

Answer 2

Whose idea of dirty?

I've checked two of your answers. Now you're on your own.