The big band theory is supported by the observation that every item in the cosmos emits radiation. Therefore, choice A is the best one.
The 1920s discovery by Hubble of a correlation between galaxy speed and distance from Earth and the 1960s discovery of cosmic microwave background radiation both serve as solid arguments for the Big Bang theory.
Several pieces of data, such as red shift, Hubble's Law, and cosmic background radiation, support this notion. In the universe, most galaxies have a red shift. This indicates that the universe is growing.
To know more about Big Bang theory, click here:
https://brainly.com/question/1160650
#SPJ4