Final answer:
The statement that best describes the sign required for a brokerage office is that every active broker must maintain a sign at each brokerage office or branch office.
Step-by-step explanation:
The correct statement that describes the sign required for a brokerage office is option c: Every active broker must maintain a sign at each brokerage office or branch office.
This means that each active broker associated with a firm is required to have a sign at every office location or branch office. This helps to identify and display the affiliation of the broker with the firm, making it easier for clients to find them.
For example, if a brokerage firm has multiple offices or branch locations, each active broker affiliated with that firm would be required to have their own sign at each office or branch.