It can be inferred from the passage that since the 20th century ______. A. schools and universities
It can be inferred from the passage that since the 20th century ______.
A. schools and universities have not taught classical literature, philosophy, and history
B. classical literature, philosophy, and history have been considered as core subjects
C. classical literature, philosophy, and history have not been taught as compulsory subjects
D. all schools and universities have taught classical literature, philosophy, and history