Which of the following sentences uses concrete language? a. i met cathy at a store on a street near the bridge. b. danny's labrador retriever eagerly chases tennis balls. c. jerry saw that the glass was really dirty. d. when i saw susan, she was reading a book.

Best answer is
A) I met Cathy at  a store on a street near the bridge. 

Although every option features concrete language, this can be considered the most concrete sentence. Concrete language, the opposite of abstract language, features little to no ambiguity in meaning, and is specific in its description. The less imagination you need to fully interpret the sentence, the more concrete it is. 

For the first one) know the subject yes yes yes yes yes