A.) helium to carbon fusion takes at least 100 million K to start.
B.) the heavier the element, the higher the temperature to fuse it.
C.) photo disintegration of iron nuclei begins at 10 billion K to ignite the supernova.
D.) the heavier the element, the less time it takes to make it.
E.) All of the above
A. We saw direct evidence of nickel to iron decay in its light curve.
B. Its progenitor had been observed previously.
C. In the Large Magellanic Cloud, we already knew its distance.
D. It occurred after new telescopes, such as Hubble, could observe it very closely.
E. All of these are correct.