Mr. Smith: You've packed everything already?
Nara: Yes, Dad. Oh, the van comes. Good-bye Dad.
Mr. Smith: _________________________.
Choose one answer.
a. Take care of yourself.
b. Stop by if you come to Chiangmai.
c. It's quite late and I don't want to miss the train.
d. See you in Spain. Good-bye.
e. Call me at my office.