In the highlighted lines, what general idea is the author most likely conveying?
a. it can be a mistake to disagree on the purpose of education.
b. what constitutes a useful education for one group of people may not be useful for another group of people.
c. although grateful for the opportunity to attend college, the author wishes to pursue a more practical course of study.
d. challenging wise men on their concept of education is best done on a national basis.