Which sentence from the passage supports the inference that some scientists have challenged
Newton's universal theory of gravity?
O 1. "Nearly three centuries would pass before the
world would host a comparable scientific
genius." (Paragraph 1)
2. "Newton's view of gravity might be called the
great equalizer." (Paragraph 3)
3. "Regardless of physical composition, everything
exerts as well as feels the force of gravity."
(Paragraph 3)
4. "This success gave Newton's theory unequivocal
support until the early part of the twentieth
century." (Paragraph 4)