Choose the letter A, B, C or D to answer these following questions

My future house will be located on a wide lake. It will be quiet and peaceful. There will be wide roof to protect my house from the sun and rain. I will grow a lot of flowers around my house. Every morning, I will water them and arrange some flowers in my house. Inside my house, there will be a modern robot to make the house clean and tidy. There will be modern and convenient appliances, too. Maybe I might buy a boat to travel around. I will order food and drink online. They might deliver them by helicopters.

Question: How can he buy food and drink?

A. by bike

B. by boat

C. at market

D. online