DCH, Inc., an investment banker, has entered into a firm-commitment underwriting with ABC Company to sell 10,000,000 shares of stock. What are the requirements of this arrangement for the investment banker?
A. Sell as much as possible and return anything left unsold to ABC Company
B. Sell at least a minimum percentage as stipulated by ABC Company
C. Sell all the shares or cancel the offering
D. Sell the entire issue or retain any shares left unsold