问题如下：
Which of the following statements is most correct?
Statement 1: Exchange-traded funds are not backed by any assets.
Statement 2:The investment companies that create exchange-traded funds are financial intermediaries.
Statement 3: Transaction costs associated with trading exchange-traded funds are greater than combined costs of trading the underlying assets.
选项：
A. Statement 1.
B. Statement 2.
C. Statement 3.
解释：
B is correct.
The investment companies that create exchange-traded funds (ETFs) are financial intermediaries. Securities that represent ownership in the assets held by the fund are ETFs. Transaction costs associated with trading exchange-traded funds are substantially lower than combined costs of trading the underlying assets.
请问选项A错在哪里，之前的解答说A是对的呀！