Which sentence below contains irony?
O A famous president once demonstrated responsibility by stating, "The buck stops here."
O Because she did not want to hike with us, Fran called the cast on her foot a "lucky break."
O Whenever Will had the opportunity, he cautioned us with the saying, "Look before you leap."
O My brother saves all the money he makes, believing in the adage "a penny saved is a penny earned."