Answer:
I and III only
I. Municipal Investment Trusts
III. Municipal Bond Funds
Step-by-step explanation:
In Series 6, securities license entitles holders to register as a company's representative and enables the holder to sell certain types of mutual funds, variable annuities and even insurance. In Series 6, individual sell or buy some mutual funds, variable life insurance, municipal fund securities, etc. They are not authorized to sell corporate securities, etc.