The American Association for Adult and Continuing Education is significant in ______.

A．The Adult Education Association was the predecessor of the American Association for Adult Education.
B．The Office of Vocational and Adult Education is a branch of the U. S. Dept. of Education.
C．The American Association for Adult and Continuing Education was developed from the National Association.
D．The U. S. Dept. of Education is responsible for the American Association for Adult and Continuing Education.

A．some researches suggest that boys and girls do not study in the same way
B．they are inspired by the success of Young Women's Leadership School
C．researches in single-sex class prove that it works better for education
D．problems in coeducation show that a single-sex school might be a better choice

A．people think it necessary to get diploma in order to find better jobs
B．people regard it as a good way to kill time since they have more leisure time
C．learning activities attract people to take further education