Based on Observations of Supernova Explosions in Distant Galaxies, It

Based on observations of supernova explosions in distant galaxies, it is predicted that 5 supernovae per century should occur in the Milky Way Galaxy, but roughly 1 supernova every 300 years has been observed from Earth. Which statement BEST explains this?

A) The majority of supernovae produce no visible light, only radio and X-ray radiation, which have been observable from Earth for only the past three decades.
B) Most supernovae occur in the galactic plane, where interstellar dust has hidden them from the view from Earth.
C) Most supernovae occur in the Milky Way and can be seen only from the southern hemisphere, where there have been very few observers until recently.
D) The majority of stars in the Galaxy are old, well beyond the supernova stage of evolution.