Between the Early 1970s and the Mid-2000s, Banks' Share of the U.S.credit

Between the early 1970s and the mid-2000s, banks' share of the U.S.credit market financial assets

A) has increased significantly as banks merged and consolidated their assets.
B) has diminished significantly as nonbank financial intermediaries started to offer more and more services that were previously offered exclusively by banks.
C) has increased steadily at the same rate as the growth in the economy's potential output.
D) has decreased steadily as more and more large U.S.firms moved production abroad to low-wage countries.