Which statement best describes what was called the solar neutrino problem?

A) Early experiments designed to detect solar neutrinos found them, but in fewer numbers than had been expected.
B) It referred to the fact that neutrinos are extremely difficult to detect.
C) Our understanding of fusion in the Sun suggested that neutrinos should be destroyed before they arrive at Earth, yet neutrinos were being detected.
D) No one understood how it could be possible for neutrinos to be produced in the Sun.


A

Physics & Space Science

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