The price of open-end funds depends on the net value of funds, while the transaction price of closed-end funds is mainly determined by the relationship between market supply and demand. Open-end funds are under redemption pressure at any time, while closed-end funds are irrevocable. The scale of open-end funds is not fixed, but there is a minimum size requirement; Closed-end funds have a fixed amount and generally cannot be issued again. Closed-end funds are not redeemable, and there is no need to withdraw reserves. They can make full use of funds, make long-term investments and achieve long-term business performance. So option b is wrong.