The neutrino has been proposed as a dark matter candidate. What is the current status of this idea?
A) It is still a viable candidate.
B) It has been rejected, because it is not massive enough.
C) It has been rejected, because it cannot "clump" to form the dark matter halo of our galaxy.
D) It has been rejected, because it has been found to be an unstable particle.
Correct Answer:
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