Question

According to measurements made by the Wilkinson Microwave Anisotropy Probe (WMAP), which material is by far the most plentiful in the universe
Dark matter
neutrinos
dark energy
baryonic matter

Answer 1

According to measurements made by the Wilkinson Microwave Anisotropy Probe (WMAP), baryonic matter is by far the most plentiful material in the universe.