In a Simple Random Sample of 100 Women from Richmond

In a simple random sample of 100 women from Richmond, Virginia, the average amount of money that these women spent per visit at their hair salons is $32.43. The standard deviation from this sample is $7.84.
Suppose that a simple random sample of 100 men in Richmond were asked how much money they spent per visit at the barbershop. The responses resulted in a mean of $21.43 and a standard deviation of $7.84. The margin of error for a 95% confidence interval for the mean amount of money that all men in Richmond spend per visit at their barbershops would be

A) larger than for women, because the men's mean was smaller.
B) smaller than for women, because the men's mean was smaller.
C) the same as for women.
D) invalid because hair salons and barbershops charge for different services.