The statement that accurately describes the origin & expansion of the universe is Cosmic background radiation is leftover thermal energy from the big bang.
The expansion of the universe may be defined as the process of enlargement in space between any two given gravitationally untied parts of the detectable universe with duration.
Cosmic radiation extremely fills the universe more or less uniformly. These radiations are responsible for the splitting down of fossil remains and are considered as one of the factors which hypothesized the big bang theory at the origin of the universe.
The complete question is as follows:
Therefore, the correct option is C.
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