Read the article and select the best answer. Article: If you go to Beijing and Shanghai, you can see the same and the different _ between them. In some ways they look the same, in some ways they look different. Both of them have tall buildings and wide streets, although some buildings in Shanghai are taller than in Beijing. They are both important in China. Beijing is the capital of China, there are more places of interest there, but Shanghai is the biggest city in China. Now they are becoming more and more important in China. Question: Shanghai is the _ city in China. Options: A: tallest B: biggest C: smallest D: busiest
Answer:
B