Answer:
D. Director of the Office of Budget and Management
Step-by-step explanation:
I would say D. Director of the Office of Budget and Management (OMB).
The Director of the OMB is responsible for drafting, adapting, and managing the President's budget, as well as ensuring it is in cooperation with all federal policies, as well as the President's. To me, the OMB Director would be the most logical to attend.