"compared to our sun, a typical white dwarf has": a) a smaller mass and half the density. b) about the same mass and a million times higher density. c) a larger mass and a 100 times lower density. d) a smaller mass and twice the density. e) about the same mass and density.

about half the mass and a million times higher density.

The closest answer is B

Explanation:

A white dwarf is what remains of a star after it uses up its nuclear fuel. Before a white dwarf is formed, it discards the external layer and retains its hot center. This center can be as hot as a hundred thousand Kelvin which then takes tens of millions of years to cool down. White dwarfs are very dense, an Earth-sized white dwarf has a density of a billion kg/. In comparison to the sun, it is about half the mass and a million times denser.