What Was Most Surprising About SN1987A

Multiple Choice

What was most surprising about SN1987A?

A) It did not produce the flood of neutrinos our models had led us to expect.
B) The parent star was a blue supergiant, much like Deneb or Rigel.
C) The supernova was luminous enough to see with the naked eye.
D) Its pulsar appeared within weeks of the explosion.
E) The supernova was not even in our own Galaxy.