The Theory That the Collapse of a Massive Star's Iron

Multiple Choice

The theory that the collapse of a massive star's iron core produces neutrinos was supported by

A) the size and structure of the Crab nebula.
B) laboratory measurements of the mass of the neutrino.
C) the brightening of supernovae a few days after they are first visible.
D) underground counts from solar neutrinos.
E) the detection of neutrinos from the supernova of 1987.