Final answer:
Studies of the early universe suggest that dark matter makes up most of the matter in the universe. Evidence from measurements of the cosmic microwave background radiation and the large-scale structure of the universe points towards cold dark matter.
Step-by-step explanation:
Studies of the early universe provide us with important clues about dark matter. Astronomers have measured the relative numbers and distances between galaxies and clusters of different sizes in the universe today, which suggests that dark matter makes up most of the matter in the universe. The evidence seems to weigh heavily in favor of cold dark matter based on measurements of the cosmic microwave background radiation and the large-scale structure of the universe.