Which evidence best supports scientists' inferences

about the origin and age of the universe?

(1) the existence of planets

(2) cosmic background radiation

(3) formation of star constellations

(4) similar composition of Earth and the Moon

The best answer for this question would be: 2. Cosmic Background Radiation The Cosmic Background Radiation are when the heat of a planet is measured by the left over heat of it. This is based on the "Big bang Theory" wherein the planets were formed because it was once a very hot radiation.