Rene Compares the Income Distributions of Male and Female Dentists

Rene compares the income distributions of male and female dentists.She finds that,among dentists,men's average income is higher than women's,but that the standard deviation of women's income is larger than the standard deviation of men's income.These results tell us that

A) there is more variation in women's income than men's income.
B) women's income is skewed,so average comparisons are inaccurate.
C) men's income is skewed,so women and men make about the same income.
D) the range of men's income is larger than the range of women's income.