What Positive Effect Have Supernovae Had on the Development of Life

What positive effect have supernovae had on the development of life on Earth?

A) Supernovae are the main source of background radiation needed for mutations.
B) Chemical elements necessary for life can only be formed in supernovae.
C) The formation of the Sun was triggered by a supernova event.
D) Planets form by accretion of material in the expanding remnant of a supernova.
E) Neutrino bombardment was necessary to form the first simple proteins.

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