Final answer:
The party that can sell shares in the primary market is the underwriter, as they are responsible for setting initial prices and overseeing the issuance of new shares during an IPO.
Step-by-step explanation:
The party that can sell shares of ABC stock in the primary market is C. Underwriter. In the primary market, companies sell new stocks and bonds to the public for the first time, which includes initial public offerings (IPOs). An underwriter is typically an investment bank that works with the company to set the initial price for the stock, oversees the issuance of shares, and takes on the risk of buying the shares from the issuer and selling them to investors.Individual investors, stockbrokers, and market makers are active in the secondary market, where existing shares are traded among investors. The main answer to who can sell in the primary market is the underwriter, as other parties like individual investors and stockbrokers exchange shares after they are initially issued on the secondary market.