Which observation has provided the MOST direct evidence that Type II supernovae are caused by the collapse of the core of a massive star?

Question

Quizplus · Accepted Answer

Neutrinos were detected from supernova SN 1987A, providing direct evidence for the collapse of the core of a massive star during a Type II supernova. Neutrinos are produced during the collapse and subsequent explosion of the star's core, and their detection was a strong confirmation of this mechanism. The other options listed provide indirect evidence or are unrelated to the collapse of massive star cores.

Which Observation Has Provided the MOST Direct Evidence That Type