In the Collapsing Core of a High-Mass Star Just Before

In the collapsing core of a high-mass star just before a supernova explosion occurs,the density is about that:

A) of degenerate gases in white dwarfs, about 10⁹ kg/m³.
B) of nuclear matter in a normal nucleus, about 4 × 10¹⁷ kg/m³.
C) at the center of the Sun, about 1.5 × 10⁵ kg/m³.
D) of iron, 7.5 × 10³ kg/m³.