Questions 18～20 are based on a talk introducing American adult education programs. You now have 15seconds to read Questions 18～20. Which of the following is true according to the talk

A．Adult education classes meet in school, public libraries, religious centers and nature science.
B．Adults can take the classes by mail or on their computers provided by the University of Arizona Extended University.
C．Some adults explore new interests through learning job skills and learning to speak a foreign language
D．An agency in the Federal Department of Education offers classes in many subjects for adults.