Answer d is correct.
Answer a is incorrect. We are more likely to recognize the failure and try something else. However, in relying on our
own experience we are offered a comparatively small number of alternatives.
Answer b is incorrect. In a combat situation, there is no time for a "second opinion." In peace time, the same is often
true. It is better to prepare ourselves with a wide range of knowledge through the study of history.
Answer c is incorrect. We can never be assured of success on the battlefield. However, we can increase the
changes through careful preparation. Part of that preparation is gathering information on techniques that have been
successful or unsuccessful in the past.
Answer d is correct. If we rely only on our experience for information on how to resolve problems, we limit the
amount of information available to us.