What does the passage say about open educational resources?
A.They contribute to teaching as much as to learning.
B.They don’t profit as much as traditional textbooks do.
C.They can’t connect professors and students as textbooks do.
D.They compete fiercely for customers with textbook producers.
What does the textbook industry need to do?
A.Reform its structures.
B.Cut its retail prices.
C.Find replacements for printed textbooks.
D.Change its business strategy periodically.
