Final answer:
The subject of this question is Business. It discusses the A-12 Avenger II Program and its background, contract details, and schedule. The grade level is College.
Step-by-step explanation:
The subject of this question is Business. The question is discussing the background and details of the A-12 Avenger II Program, which is a project related to the US Navy and aircraft development. It mentions the contract, test articles, flight units, and the first flight schedule.
In this context, the grade level of the question is College as it requires knowledge and understanding of program management, contracts, and aviation development.