Question

what will a medium mass star become at the very end of its life cycle?
a red giant
a black hole
a black dwarf
a neutron star

Explanation:

A medium - mass star first becomes a red giant. After shedding its outer layers, it forms a white dwarf. Over a very long time, the white dwarf cools down to become a black dwarf. Black holes and neutron stars are formed from much more massive stars.

Answer:

C. a black dwarf