Sunspots were discovered by:
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Alessandro Volta
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Edward Morley
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Ernest Rutherford
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Galileo
D
Correct answer
Explanation
Galileo Galilei was one of the first astronomers to observe and document sunspots using his telescope in the early 1600s. Alessandro Volta is known for the electric battery, Edward Morley for the Michelson-Morley experiment, and Ernest Rutherford for nuclear physics.