Answer :
The correct option is D.
The big bang theory is the scientific theory that explains how the universe came to exist. The theory explains how the universe expanded due to high temperature and density. Scientists believed that the first nuclei were formed few minutes after the bing bang occurred via a process called bing bang nucloesynthesis. During this process helium and hydrogen were formed and the amount of helium found correspond to the amount predicted by scientists.
The big bang theory is the scientific theory that explains how the universe came to exist. The theory explains how the universe expanded due to high temperature and density. Scientists believed that the first nuclei were formed few minutes after the bing bang occurred via a process called bing bang nucloesynthesis. During this process helium and hydrogen were formed and the amount of helium found correspond to the amount predicted by scientists.