What processes were occurring when this photograph was taken or at some time in the recent past?
A. nuclear fusion, gravitational attraction of material, and movement and rotation of the galaxy
B. nuclear fusion and emission of energetic electromagnetic radiation
C. nuclear fusion and nucleosynthesis of helium, convection in the interior, and emission of electromagnetic radiation and heat
D. ejection of material from a star, at a high rate and in all directions
Answer: A
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