Final answer:
When President Harding appointed Andrew Mellon as Secretary of the Treasury, he sent a message of support for conservative fiscal policies and pro-business interests. Mellon's actions as Treasury Secretary, such as implementing tax cuts for the wealthy and creating the General Accounting Office, aligned with Harding's message.
Step-by-step explanation:
When President Harding appointed Andrew Mellon as Secretary of the Treasury, he sent a message of support for conservative fiscal policies and pro-business interests. Mellon, a wealthy businessman and philanthropist, advocated for low taxes for corporations and the wealthy, believing it would stimulate economic growth. His actions as Treasury Secretary aligned with Harding's message, as he implemented deep tax cuts for the wealthy and created the General Accounting Office to audit government budgets. Mellon's appointment and actions reflected Harding's pro-business agenda.