Good marksmanship is best defined as:

Good marksmanship is best defined as hitting your target accurately and consistently because it encompasses both precision and reliability in shooting. Accuracy refers to the ability to hit the intended target, while consistency signifies that a shooter can achieve this level of performance repeatedly under various conditions. This definition reflects the core objectives of marksmanship, emphasizing not just the initial impact on the target but also the ability to maintain that level of skill over time, which is crucial for hunting and shooting sports.

While other aspects, such as careful aiming and using quality ammunition, can certainly contribute to effective shooting, they do not fully encapsulate the essence of marksmanship. Good marksmanship is ultimately assessed by the shooter's ability to strike the target accurately and consistently across shots, which is what makes option B the most comprehensive and appropriate choice.