Which of the following statements is an example of sarcasm?

A. "We didn't do so well," Trish replied in the wake of her team's 56-to-12 loss.
B. "Awesome," the student grumbled at his lunch, "fish heads again."
C. That new 3-D action flick is the be-all and end-all of movies.
D. The physics exam wasn't exactly a cakewalk for Sam.