If observations had shown that the cosmic microwave background was perfectly smooth (rather than having very slight variations in temperature), then we would have no way to account for .
A)the relationship between the strong and the weak force
B)how galaxies came to exist
C)the fact that our universe is expanding
D)the existence of helium in the universe

Question

Quizplus · Accepted Answer

The slight variations in temperature in the cosmic microwave background are believed to be the gravitational imprint of initial density fluctuations that eventually led to the formation of galaxies. If the background was perfectly smooth, we would have no explanation for how galaxies came to exist. The other options are not directly related to the cosmic microwave background.

If Observations Had Shown That the Cosmic Microwave Background Was