Under the Model Rules, the Letterhead of a Law Firm

Under the Model Rules, the letterhead of a law firm must follow a specific requirement if the law firm has offices in more than one jurisdiction and uses the same name in each jurisdiction. What is that specific requirement?

A) Any listing of lawyers associated with one office must state the jurisdictions in which each lawyer is admitted.
B) Any listing of lawyers associated with one office must state the jurisdictional limitations on any lawyers not admitted to practice in the jurisdiction where the office is located.
C) The letterhead must include a disclaimer stating that each office of the firm is a separate partnership or corporate entity formed in the jurisdiction where it is located.
D) None of the above.