Please answer the following question: Venice is the Queen of the Adriatic Sea .Every year many people visit the city. Why do they go there? Because Venice is a beautiful city. There aren't any roads in the city, so there aren't any cars or buses. There are a lot of canals. People go up and down the canals in boats. But Venice is going down, and water is going up. In 2040 Venice will be under the water. The Adriatic Sea will cover the city. But the people in Venice love the city and want to stay there. How can they stay there? People go up and down by _ . A) car B) plane C) boat D) bus
A:
C