Investment Banks in the U.S. Are

Investment banks in the U.S. are

A) regular banks specializing in investment projects.
B) not banks at all but institutions which specialize in underwriting sales of stocks and bonds.
C) special arm of the U.S. government for U.S. banks operating outside the U.S.
D) regular banks specializing in investment projects, but allowed to offer limited domestic transactions.
E) international banks that are heavily invested in the U.S.