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

Question

Responses

Its temperature is uniform.
Its temperature is uniform.

Its temperature fluctuates greatly.
Its temperature fluctuates greatly.

Its mass fluctuates greatly.
Its mass fluctuates greatly.

Its mass is uniform.

Answer 1

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

Its temperature is uniform.

This uniformity indicates that the CMB is the afterglow of the hot, dense state of the early universe and has cooled down over time, leading to a nearly uniform temperature across the sky.