Which airports are in conflict with either R931A or R931B?

The correct answer identifies a set of airports that are in conflict with specific airspace restrictions, namely R931A or R931B. These airspace designations typically represent restricted areas where certain flight operations are not permitted or are limited due to various reasons such as military activity, safety, or security.

In this case, the choice of KSTF, KTUP, KGTR, and KCBM includes airports that are positioned in such a way that their operations may interfere with the defined boundaries of R931A or R931B. Understanding the geographical layout and operational protocols of these airports allows air traffic control and pilots to steer clear of potential conflicts, ensuring safe and efficient air travel in and around restricted zones.

The other airport selections do not have a similar conflict with R931A or R931B, indicating that their operations occur outside the designated restricted airspace or do not present a risk to the active airspace management procedures in those specific areas. Thus, the distinction made by the selected answer is vital for maintaining air safety and ensuring compliance with Federal Aviation Administration regulations surrounding restricted airspace.