Which of the Following Is Not a Function Performed by an Investment

Which of the following is not a function performed by an investment banker as part of a full commitment underwriting?

A) provides advice to the issuing firm on the projects in which it should invest the money raised
B) provides advice to the issuing firm on what type of security should be issued in order to raise the funds
C) purchases the securities from the issuing firm
D) provides short-term price support for the security after it begins trading in the secondary market