If the Sun Suddenly Stopped Emitting Neutrinos,what Might We Infer

If the Sun suddenly stopped emitting neutrinos,what might we infer (after checking that our neutrino detectors were still operational) ?

A) Fusion reactions in the Sun ceased a few hundred thousand years ago.
B) Fission reactions in the Sun have ceased.
C) Fusion reactions in the Sun have ceased.
D) The Sun has exhausted its supply of neutrinos.