Why can't the dark matter in galaxies be made of neutrinos?
A) There are not enough neutrinos to make up all the dark matter.
B) Neutrinos have zero mass like the photon.
C) We know that dark massive objects, such as planets and neutron stars, are not made of neutrinos.
D) Neutrinos travel at extremely high speeds and can escape a galaxy's gravitational pull.
Correct Answer:
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