Why didn't elements heavier than helium form in the first minutes of creation?
A) When He-4 was formed, the expansion cooled the cosmos below 100 million K.
B) The first generation of stars used them up too quickly to observe them.
C) The electrons slowed down enough to be captured into orbits by protons.
D) There was not enough matter in the universe at that time.
E) Only Type I supernovae can produce iron and heavier elements.
A
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