Which is an example of sarcasm?

A."John has strong organizational skills," his teacher exclaimed. "His notebook is as organized as a library."

B.Bobby showed up for his date with Jennifer with a bouquet of flowers in his hand. Jennifer exclaimed, "Why, you're a regular Romeo!"

C.Tammy is like a walking dictionary — she can spell any word at any time!

D.My little brother was flying his kite in the front yard when a neighbor came out and asked, "Are you flying a kite?" My brother answered, "Nope, just fishing for birds."