Which ONE of the Following Statements Is True About Secondary

Which ONE of the following statements is true about secondary markets?

A) In secondary markets, outstanding shares of stock are bought and sold among investors.
B) For an investor, the function of secondary markets is to provide profitability for the shares of securities they own.
C) An active secondary market causes firms to sell their new debt or equity issues at a higher cost of funds.
D) All of the above are true statements