Final answer:
Numerical evidence alone is not enough to determine the convergency or divergence of an improper integral; mathematical methods are required.
Step-by-step explanation:
To determine the convergency or divergence of an improper integral, numerical evidence alone is not sufficient. In order to make a conclusion, we need to analyze the behavior of the integral as the limit of integration approaches a certain value. Convergency occurs when the integral approaches a finite value, while divergence occurs when the integral approaches infinity or does not exist.
Therefore, statement (a), (b), (c), and (d) cannot be concluded based solely on numerical evidence. We need to analyze the integral using mathematical techniques such as integration methods or comparison tests to determine the convergency or divergence.