Banks Usually Offer Higher Rates of Interest to People Willing

Banks usually offer higher rates of interest to people willing to keep their funds in the bank longer because:

A) These depositors are the banks' best customers
B) Banks really do not want a lot of people coming into the bank
C) Bankers realize time has value and people need to be compensated if they are to keep their money in the bank longer
D) These depositors are very wealthy and so have other options about what to do with their funds