问题如下：
An investor has found that value stocks have better performance than growth stocks. She wishes to exploit the value effect, so which stock should be purchased?
选项：
A. The stock of companies with higher than average dividend yields.
B. The stock of companies with higher than average market-to-book ratios.
C. The stock of companies with higher than average price-to-earnings ratios.
解释：
A is correct.
A value stock has below characteristics: above-average dividend yield, low price-to-earnings and low market-to-book ratios, and a growth stock has the opposite characteristics.
老师，这道题没懂，可以解释一下吗？谢谢
