Gus Hayden, CFA, has developed a mutual fund selection product based on historical information from 2000-2010 period and performs a hypothesis test about performances of different styles. In order to minimize the probability of both Type Ⅰ and Type Ⅱ error, Hayden should increase the:（）

A. the power of a test.

B. level of significance.

C. sample size.

如何使“网络问政”真正成为联系群众的新方式，使“网络问政”常态化、制度化，是网络问政的一个难题，作为职能部门工作人员，请给出你的可行性措施。
[要求] 措施切实可行，条理清楚，不超过300字。