If Male and Female College Students Work an Average of 15

If male and female college students work an average of 15 hours per week during the school year and the standard deviation is 5.4 for male students and 2.3 for female students,what may we conclude?

A) males are more heterogeneous on this variable
B) females are more heterogeneous on this variable
C) the median number of hours worked is the same
D) the modal number of hours worked is the same