Fill the blank spaces with the most appropriate of options A-E: Radium …. Maria Sklodowska…

Fill the blank spaces with the most appropriate of options A-E:
Radium …. Maria Sklodowska Curie.
  • A.
    discovered
  • B.
    is discovering
  • C.
    has discovered
  • D.
    was discovered by
  • E.
    had been discovered by
Correct Answer: Option D
Explanation
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