Questions 18 to 20 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage. Which of the following is a requirement for having children qualify for the programs
A．The parents must both be university students. B．The parents must live in university housing. C．The children must be at least six years old. D．At least one parent must be studying for a doctorate degre