It Has Been Argued That Banks Tended Not to Take

It has been argued that banks tended not to take full advantage of issuing notes, thereby passing up potential profits because

A) the profit amounts were small.
B) they were not the types of profits conservative bankers wanted to pursue.
C) regulations and opportunity costs involved with the issuance itself limited the profits.
D) All of the above are correct.
E) Only a and c are correct.