A Styrofoam Sphere of Radius R Has a Density

Multiple Choice

A styrofoam sphere of radius R has a density $\rho .$ You now carefully compress the sphere so its radius is R/2 . What is the density of the compressed sphere?

A) $8 \rho$
B) $4 \rho$
C) $\rho \sqrt { 2 }$
D) $\rho \sqrt { 8 }$
E) $2 \rho$