问题如下：
Which statement regarding the differences between commodities and financial assets is incorrect?
选项：
A. Commodities have substantial storage costs while financial assets' storage costs are negligible.
B. Commodities can be costly to transport while finacial assets are ussually transported electronically at virtually no cost.
C. Financial assets provide expected financial return reflecting their risk while prices of most commodities are mean reverting.
D. Financial assets can be borrowed for shorting while commodities do not have this property.
解释：
A commodity held for investment purposes (e.g., gold or silver) can be borrowed for shorting. However, the borrower must pay what is called a lease rate.
Statement in D is incorrect.
选项C为什么说大宗商品是mean reverting的呢