According to the speaker, what should the listeners do when they first get their mail（）

A. Noblemen centuries ago did not like traveling.
B. Heredity is not the only thing that influences our color.
C. Exposure to sunlight is the only thing that determines skin color.
D. Having a tan is considered a sign of wealth nowadays in North America.

A. To go sightseeing.
B. To have meetings.
C. To promote a new champagne.
D. To join in a training program.