Which of the following is NOT an objective of the Global Investment Performance Standards GIPS)（）

A. To ensure accurate and consistent investment performance data for reporting, record keeping, marketing, and presentation.

B. To promote fair, global competition among investment firms for all markets without creating barriers to entry for new firms.

C. To obtain worldwide recognition by securities regulators of a standard for the calculation and presentation of investment performance in a fair, comparable format that provides full disclosure.

由于某种全局性的因素引起的股票投资收益可能变动，这种因素对市场上所有的股票收益都产生影响的风险是( )。

A．系统风险

B．非系统风险

C．政策风险

D．市场风险