问题如下：
The law of one price is best described as:
选项：
A. the true fundamental value of an asset.
B. earning a risk-free profit without committing any capital.
C. two assets that will produce the same cash flows in the future must sell for equivalent prices.
解释：
C is correct.
The law of one price occurs when market participants engage in arbitrage activities so that identical assets sell for the same price in different markets.
A is incorrect because the law of one price refers to identical assets. B is incorrect because it refer to arbitrage not the law of one price.
A为什么不对呢？不是fundamental value么？