If a white dwarf adds material from a nearby red giant, the result is a a. black hole b. supernova c. nova d. pulsar

Supernova

Explanation:

there a number of white dwarfs that fades away resulting radiating all its energy, but some go through different phase.

if a white dwarf adds material from a nearby red giant, it will result to an increase in temperature which will trigger a runway reaction resulting a violent supernova which will destroy the white dwarf.

photocells convert light energy to electricity