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. O 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. O c. It exhibits very slight temperature differences, which would allow denser regions of matter to condense into future galaxies. O 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.

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. O 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. O c. It exhibits very slight temperature differences, which would allow denser regions of matter to condense into future galaxies. O 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.