What is an important result of using countermeasures like jamming?

The choice regarding impaired enemy targeting capabilities is correct because countermeasures like jamming are specifically designed to disrupt an adversary's ability to effectively target and engage friendly forces. Jamming interferes with the communication and radar systems that enemy forces rely on for surveillance and targeting, ultimately reducing their effectiveness in identifying and striking their intended targets. This tactical advantage can significantly enhance the operational success of friendly forces by creating uncertainty and confusion among enemies, allowing for safer missions and better strategic positioning.

In contrast, the other choices do not directly relate to the primary purpose of countermeasures like jamming. For instance, while increased speed, reduced operational costs, and enhanced cargo capacity might be desirable outcomes in some military operations, they are not functions or direct results of the use of jamming techniques. Thus, these options do not capture the essence of what jamming is meant to accomplish on the battlefield.