Why Is the Fact That the Cosmic Microwave Background Radiation

Why is the fact that the cosmic microwave background radiation (CMB) is very smooth considered a problem?

A) A universe as smooth as predicted by the CMB should not have formed as many galaxies as have been observed.
B) A universe as smooth as predicted by the CMB should have collapsed by now.
C) A universe as smooth as predicted by the CMB should be expanding much faster than we are now.
D) A universe as smooth as predicted by the CMB should never occur because quantum mechanical fluctuations would have been imprinted on it.
E) A universe as smooth as predicted by the CMB should never have formed any stars or galaxies.

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