Mr. Smith: Excuse me, Ben. Why are you late for class today?
Ben: I'm really sorry, Mr. Smith. I missed the bus because there was an unexpected traffic jam on my way to school.
Mr. Smith: Alright, try to be on time next lesson.
Which sentence gives an explanation for Ben's lateness?
A) "Why are you late for class today?"
B) "I'm really sorry, Mr. Smith."
C) "I missed the bus because there was an unexpected traffic jam on my way to school."
D) "Alright, try to be on time next lesson."