Answer Happy

Which of the following is true of the cosmic microwave
background radiation as we observe it today?
a.
It is observed at extremely high energies, such as gamma and
x-rays, because the early universe was extremely hot.
b.
It is much stronger in certain directions of the sky, due to the
fact the Big Bang happened in a specific direction relative to the
Milky Way.
c.
It exhibits very slight temperature differences, which would
allow denser regions of matter to condense into future
galaxies.
d.
It implies that the early universe was relatively cool, because
microwaves are emitted by objects that are only a few degrees above
absolute zero.