How Has the Present Mix of Chemical Elements in the Universe

Multiple Choice

How has the present mix of chemical elements in the universe been produced?

A) All the known elements have been formed by the radioactive breakup of the heavy elements formed in the initial Big Bang.
B) All of the known elements were formed in the Big Bang.
C) H and He were formed in the Big Bang, while the heavier elements have been slowly forming by collisions in cold interstellar gas clouds.
D) H and some He were formed in the Big Bang, while the heavier elements have been slowly formed in the centers of stars over the life of the universe.