Answer:
C) That the CMB is nearly uniform and cold
D) That hydrogen, helium, and just a few other light elements are in high abundance
Step-by-step explanation:
The Big Bang theory predicts that there is cosmic microwave background that should be uniform and it is the result of the heat at the beginning of the universe. It also says how much of elements like hydrogen and helium should be in the universe when everything starts. Scientifics discover this cosmic microwave background CMB and where they look over old galaxies, the amount of hydrogen and helium is accurate to the theory. Therefore, the two solid pieces of conformation data for the Big Bang are:
C) That the CMB is nearly uniform and cold
D) That hydrogen, helium, and just a few other light elements are in high abundance