The word "lucrative" in Line 1, Para. 4 most probably means _______.

A．they provide the students with very prosperous subjects to learn
B．they assume that their graduates can earn much more than they had paid
C．they don't get financial support from the government
D．they need much revenue to support the educational expenses

A．Professor Walker's Research.
B．How to Make Big Money.
C．Differences Between Science and Arts Degrees.
D．Studying Arts Has Negative Financial Outcome.