Answer: C.
Explanation:
According to the best estimates of astronomers there are at least one hundred billion galaxies in the observable universe.
Answer:
The answer would be C.
Explanation:
It cannot be A because solar systems are inside galaxies, not the other way around. It cannot be B because of the same reason for A. It cannot be D because there are more than just millions of galaxies, there are billions. C is correct because galaxies are inside the universe and there are billions of galaxies.
