A White Dwarf,as It Evolves,undergoes Which Change

A white dwarf,as it evolves,undergoes which change?

A) Its temperature remains constant, but its radius and therefore its luminosity decrease.
B) Luminosity and size decrease, while its temperature remains constant.
C) It shrinks in size, the resulting release of gravitational energy keeping both luminosity and temperature constant.
D) Luminosity and temperature decrease.