If the Density of the Universe Is Lower Than the Critical

Multiple Choice

If the density of the universe is lower than the critical density, this means that:

A) the universe is expanding at a rate equal to the escape speed of the universe.
B) the universe is expanding at a rate less than the escape speed of the universe.
C) the universe is expanding at a rate greater than the escape speed of the universe.
D) the universe is expanding at a rate equal to the speed of light.
E) the universe is expanding at a rate greater than the speed of light.