A major outcome of Galileo Galilei's research during the scientific revolution Galileo popularized the scientific method as a way to study the natural world. Thus the correct answer is A.
In the early modern era, a sequence of discoveries in mathematics, physics, astronomy, biology, and chemistry changed how society viewed nature. These developments are known as the Scientific Revolution.
The telescope was enhanced by Galileo Galilei, who also made several significant astronomical discoveries using it, including the discovery of the four biggest moons of Jupiter, the phases of Venus, the Saturnian rings, and in-depth examinations of sunspots.
Therefore, option A Galileo popularized the scientific method as a way to study the natural world.
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