[Solved] 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. Absolute Standard: A fixed criterion of measure that remains unchanged over time and under different conditions. Perception Error: A mistake in interpreting or understanding information received from the environment due to biases, incorrect information, or misinterpretation. Cross-Cultural Negotiations: The process of discussing and coming to an agreement between parties from different cultural backgrounds. Social Connections: The relationships and networks that individuals form with others.