Questions 1 to 3 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions.
Now, listen to the conversation.

It can be inferred from the conversation that().

A. the two speakers are the student and the professor.
B. the development of large cities in the developing countries is not balanced.
C. the large cities in the developing countries grew as rapidly as those in the developed countries.
D. it’s easy to solve the problems of the large cities.