Which evidence supports the idea that Cosmic Microwave Background radiation is a remnant of the Big Bang?(1 point)

Question

Responses

Its mass is uniform.
Its mass is uniform.

Its temperature is uniform.
Its temperature is uniform.

Its temperature fluctuates greatly.
Its temperature fluctuates greatly.

Its mass fluctuates greatly.

Answer 1

The response that best supports the idea that Cosmic Microwave Background (CMB) radiation is a remnant of the Big Bang is:

Its temperature is uniform.

This uniformity in temperature across the sky is evidence of the homogeneous nature of the early universe shortly after the Big Bang, supporting the Big Bang theory. The slight fluctuations in temperature are also important, but the overall uniformity is a key piece of evidence.