An analyst wants to determine whether the monthly returns on two stocks over the last year were the same or not. What test should she use if she is willing to assume that the returns are normally distributed（）

A. A paired comparisons test because the samples are not independent.

B. A difference in means test with pooled variances from the two samples.

C. An F-test with the greater mean in the numerator.

容积率是指地面上总建筑面积计算值与（）之比。

A．规划建设用地面积

B．项目建筑面积

C．总建设用地面积

D．批准预售面积