Why Are Terrestrial Planets Denser Than Jovian Planets

Multiple Choice

Why are terrestrial planets denser than jovian planets?

A) The Sun's gravity gathered dense materials into the inner solar system.
B) Gravity compresses terrestrial planets to a higher degree, making them denser.
C) Actually, the jovian planets are denser than the terrestrial planets.
D) Only dense materials could condense in the inner solar nebula.