Which of the following most likely happens when the volume of a gas increases?

Forgot the question hahaha

D=m/v =57.9/3 = 19.3 g/cm^3

Using dilution equationm1v1 =m2v2 ; where m1 and m1 are the intiial and final concentration, and v1 and v2 are the initial and final volume.5  × 5 m = 8 l  × m2m2 = 25/8 = 3.125 mtherefore; the resulting molarity is 3.125 m

If your on odysseyware i believe the answer would be c.