Which reason supports the observations of the big bang theory? A. abundance of helium and deuterium B. presence of black holes in the center of galaxies C. carbon dating of baryonic matter D. observation of radiation from isotopes

A. the expansion of the universe

C. the helium abundance

D. the cosmic microwave background

Explanation:

Cosmology is a branch of astronomy that deals with how the universe was formed,different processes that occurred and the eventual destiny of the universe at the end.

Cosmology employed the use of bing bang theory to make findings about the universe.

The expansion of the universe, helium abundance and cosmic microwave background are the major observations in cosmology as they help in explaining some occurrences.

Explanation:HOPE THIS HELPS:)

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a. rock

explanation:

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