Respuesta :
❤️Hello!❤️ A. Leftover radiation exists from the big bang
C. Hydrogen and helium exist in abundance
D. The universe is still expanding Hope this helps! ↪️ Autumn ↩️
The predictions based on the big bang theory are leftover radiation exists from the big bang and hydrogen and helium exist in abundance.
What is big bang?
The big bang is the theory which explains that how the universe began. It says that the universe began with just a single point. It went on expanding and stretched to grow as large as possible. It is still now expanding.
The big bang consist of fully dark matter, interstellar gases or dust. The big bang is increasing just because in universe there is abundant of hydrogen and helium.
The radiations come from the big bang. This big bang is still on it way of expanding more.
Learn more about big bang.
https://brainly.com/question/18297161
#SPJ5