When submitting a trade ticket for a short sale, an investment advisor mustmark the sell-order ticket as a short sale. This ensures compliance with regulatory requirements and informs the broker and exchange that the sale involves borrowed shares. Marking the order appropriately helps maintain transparency and enables monitoring for potential market manipulation.

A. Verify the client can borrow the shares: The responsibility for ensuring share availability lies with the broker, not the advisor.

C. Obtain minimum margin amount from client: This is done separately as part of the account setup and transaction process, not when submitting the trade ticket.

D. Mark it as a margin order: Short sales involve margin, but the ticket must specifically indicate "short sale" rather than just "margin."