Which occurrence would contradict the big bang theory?
a. over time, distant galaxies move progressively closer to earth.
b. a scientist discovers a black hole outside the milky way galaxy.
c. the average temperature of the universe decreases.
d. a scientist discovers a planet that is about 10 million years old.

The big bang theory states that all the matter that makes the universe was, at the beginning,
I in a single infinitesimally small and infinitesimally dense point. Then, the
point explodes given birth to the universe that we know. One of the major foundations
that the universe was originated in that explosion called the big bang was made
by Hubble when he proved that the universe is expanding; therefore, generally
speaking galaxies are moving away from earth. The occurrence that contradicts
the big bang theory is: A “Over time, distant galaxies move progressively closer to Earth 

Search it up or look it up on the dictionarysorry i wasn't any

The correct answer should be brand c.