Essentially All the Elements Heavier Than Iron in Our Milky

Multiple Choice

Essentially all the elements heavier than iron in our Milky Way were formed

A) by supernovae or neutron star mergers.
B) during the formation of black holes.
C) by fusion in the cores of the most massive main-sequence stars.
D) during the formation of planetary nebulae.
E) during the initial stages of the Big Bang.