Answer:
c. IBM issues 2,000,000 shares of new stock and sells them to the public through an investment banker
Explanation:
The primary market is the market when for the first time the new securities such as shares, stocks, etc. are being provided to the general public or we can refer initial public offer. The initial public offer is an illustration of the primary market
Whereas the secondary market is the market where the shares are bought or sold through the investors after they are provided to the general public.
For examples-New York Stock Exchange (NYSE), etc.