Final answer:
A stockbroker can be referred to as a sales representative, a registered agent, or an account executive; hence, all the options provided are correct names for a stockbroker. Option d is the answer.
Step-by-step explanation:
Another name for a stockbroker could be any of the following: a sales representative, a registered agent, or an account executive. Therefore, the correct answer to the question is d. All of these.
It's important to understand that stockbrokers can be known by different titles depending on the context and their specific role within an organization. They perform a variety of duties, including buying and selling stocks on behalf of their clients, providing financial advice, and managing investment portfolios.