How Do the Properties of the CMB Give Support to the Existence

How do the properties of the CMB give support to the existence of dark matter?

A) The CMB has the same temperature as the cold dark matter.
B) The faint glow of the CMB was actually produced by dark matter particles as they annihilated particles of normal matter.
C) The opaque CMB is essentially hiding the dark matter that existed earlier in the universe.
D) The CMB is too smooth to account for the structure we observe in the universe unless dark matter exists.
E) The observed spatial scale of CMB clumping perfectly matches that of the dark matter.