问题如下：
Tim is an investor who primarily invest publicly traded stocks. He is considerding diversify his investment portfolio. John, a friend of Tim, has advised Tim to invest in commodity. According to the information, which of the following statements is correct?
选项：
A. The purchase of commodity would best be characterized as a transaction in the derivative investment market.
B. The purchase of commodity would best be characterized as a transaction in the traditional investment market.
C. The purchase of commodity would best be characterized as a transaction in the alternative investment market.
解释：
C is correct.
Ccommodity is classified as an alternative investment product.
大宗商品基本是期货交易，为什么不选A
