问题
单项选择题
An analyst does research about portfolio management process. Which of the following statements is commonly believed to have the greatest impact on portfolio performance（）
A. Security selecting.
B. Time selecting.
C. Asset allocation.
答案
参考答案：C
解析：
资产配置决策被认为是决定投资组合收益最重要的因素，组合收益的高低并不在于择时及择股。