Many Extrasolar Planets Identified by Astronomers Have Masses Exceeding That

Many extrasolar planets identified by astronomers have masses exceeding that of Jupiter.How does this lead to higher densities for these planets?

A) They are expected to have formed closer to their parent stars, where the protostellar nebula was denser.
B) Their higher masses lead to stronger gravitational forces, causing them to shrink with time, which leads to higher densities
C) Their higher masses have led them to accrete more planetesimals, resulting in higher densities than Jupiter
D) They are expected to orbit far from their parent stars, resulting in colder, denser atmospheres than Jupiter
E) They were able to fuse hydrogen into helium for a short period of time, resulting in denser cores than Jupiter has