Which of the following is/are true regarding the secondary market? a. Financial instruments sold in the secondary market generate a 10% commission for the original, issuing firm. b. If an existing financial instrument is sold using a stock exchange, it is a secondary market sale; however, if it is sold using an 'Over the Counter" dealer, it is a primary market sale. c. The secondary market provides information on market valuation that can be used to inform new issues of instruments in the primary market d. The secondary market provides liquidity to holders of securities (a place they can sell shares to raise cash if needed.) e. Only c and d are true