Final answer:
Generally, it is true that a broker must file a DBA with the county clerk in every county where they have an office, to ensure public transparency of business ownership.
Step-by-step explanation:
The statement, "A broker with a DBA (doing business as) or assumed name, must file with the county clerk in EVERY COUNTY where he/she has an OFFICE," is generally True. Every state has specific regulations on DBAs, but it is a common requirement for a business, including brokers, to register their DBA with the county clerk's office in each county where they have an established office. This is to ensure that the public can identify the true owner of a business. The registration process would typically involve filling out a form with the county clerk and paying a filing fee.