Choose the correct option.
Correct answer: D. Newton discovered that gravity pulls everything towards it.
- A. Newton discovered that gravity pulled everything away from it.
- B. None of these is correct.
- C. Both of these are correct
- D. Newton discovered that gravity pulls everything towards it.
Explanation
Gravity pulls everything towards it - this is a universal truth. Universal truths are always expressed in the present tense even when narration is in the past. Therefore, the correct sentence is "Newton discovered that gravity pulls everything towards it."
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