What term may refer to an administrative agency?

The term "administrative agency" can indeed be synonymous with several terms, including commission, board, and authority. In the context of governmental functions, these different terms generally refer to organizations created by legislatures to implement and enforce specific laws and regulations.

A commission typically refers to a body that has regulatory powers over a certain area, such as the Securities and Exchange Commission (SEC), which oversees securities markets and protects investors.

A board often represents entities that have oversight responsibilities in specific fields, such as a state board of education that governs educational standards or professional licensing boards that regulate the practices of various professions.

An authority usually denotes a specialized agency with a specific mandate, often related to public services, such as a housing authority that manages public housing for a community.

Each of these terms, while distinguishable, reflects the organizational structure and functions of agencies tasked with administrative responsibilities. Since all three terms can apply to types of administrative agencies, the selection of "All of the above" is indeed the correct choice, as it encompasses the various terminologies used in this context.