Change the voice of the following sentence. **What is the active voice of the following sentence? When was the theory of gravity discovered by Newton and later explained in detail by scientists?**

Options:

  • A: When Newton discovers the theory of gravity and later scientists explained it in detail?
  • B: When did Newton discover the theory of gravity and later scientists explained it in detail?
  • C: When Newton discovered the theory of gravity and later explained by the scientists?
  • D: When was the Newton discovered the theory of gravity and later it was explained by scientists?

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