问题
单项选择题
The implication of efficient capital markets and a lack of superior analysts have led to the introduction of:（）
A. futures options.
B. index funds.
C. balanced funds.
答案
参考答案：B
解析：
An index fund is designed to duplicate the composition of a specific index series or market segment. There is a strong argument suggesting that portfolio managers cannot beat the market after fees, therefore an index fund should be used to try to match the market.