这道题是什么意思，用几十个股票来track沪深300，没看出啥问题啊

问题如下：

O 'Neill, FRM, manages a mid-cap fund that invests in a range of 50 to 60 stocks. O 'neill declares in the product publicity material that: "Through our active management approach, we chose securities that were similar to the S&P 500," As a result, the fund is designed to track the performance of the S&P 500, would earn a 3 to 6 per cent return. The above statement:

选项：

A.

Permissible since the statement is supported by modern portfolio theory

B.

Not permissible since O 'Neill is misrepresenting the services that portfolio are capable of performing

C.

Not permissible since O 'Neill is misrepresenting the investment performance that can achieve

D.

Permissible since the statement is accurate

解释：

It does not make sense that a portfolio of 50 to 60 mid-cap stocks would track the entire S&P 500. Actually there is a significant difference between the performance of the portfolio and the S&P 500. There's no guarantee of a 3 to 6 percent return. The statement violates standard 1.4: “GARP Members shall not knowingly misrepresent details relating to analysis, recommendations, actions, or other professional activities,” because she has given implicit assurance as to the expected performance of the Fund.