The Air Force (AF) organizes, trains, equips, and sustains its forces to be ready to meet:

The correct choice emphasizes the primary mission of the Air Force, which is to ensure readiness to respond to national security challenges. The Air Force is structured and equipped not only to tackle current threats but also to anticipate and prepare for future conflicts, maintaining a posture that allows for rapid deployment and effective engagement. This readiness encompasses a wide range of scenarios, from conventional warfare to hybrid threats, which can emerge unexpectedly.

The other options do not align with the overarching goals of the Air Force. Requests by individual state governors pertain more to state militia or National Guard units rather than the active-duty Air Force's federal responsibilities. Local management forces are not within the scope of the Air Force’s core functions, which are primarily focused on national defense and global commitments. Lastly, while foreign rotational surges may involve the Air Force, they are specific situations rather than the broader preparation for varied national security challenges that the Air Force must be ready to face.