A credit union can usually offer lower interest rates on loans (APR) than commercial banks. What is the main reason that credit unions can offer lower interest rates than commercial banks?

A. They have higher investment in technology and fixed assets (buildings) than banks, which gives them greater tax deductions.
B. Credit unions have favorable tax treatment by the IRS
C. They are legally able to offer lower interest rates on CDs and savings accounts, which makes it easier to get loans.
D. Simple supply and demand there are more credit unions than banks, so they have to charge lower interest rates to compete.