How was MOST of the helium in the universe created?
A) by nuclear reactions in the cores of stars and then thrown out into space by supernovae
B) by high-energy processes during the collapse of pregalactic clouds during the formation of galaxies
C) by nuclear reactions during the first 3 minutes following the Big Bang
D) by the collision of cosmic rays with hydrogen nuclei in interstellar gas clouds

Question

Quizplus · Accepted Answer

Most of the helium in the universe was created by nuclear reactions during the first 3 minutes following the Big Bang, in a process known as Big Bang nucleosynthesis. This period allowed for the formation of most of the helium, along with hydrogen and small amounts of other light elements.

How Was MOST of the Helium in the Universe Created