What characterizes a multiple line agency?

A multiple line agency is characterized by its ability to sell insurance policies from a variety of different insurance companies, often representing many insurers that cover various types of insurance products. This allows the agency to offer a more comprehensive range of options to clients, catering to diverse needs such as life, health, property, and casualty insurance. By working with multiple affiliated companies, these agencies can provide their clients with tailored solutions that best fit their unique situations, rather than limiting them to a single company's offerings.

Option B captures this essence perfectly, as it highlights that a multiple line agency sells policies of a group of affiliated companies, thus reflecting the agency's capability to cover various lines of insurance and provide clients with a broader selection of policies.

Focusing exclusively on one type of insurance policy would classify an agency as a single line agency, which does not reflect the diversity that a multiple line agency embodies. Operating solely online does not define the agency's range of services or affiliations, while functioning without corporate backing would imply independence but does not specifically pertain to the multiple lines of insurance that the agency provides.