Which of the following statements is correct?

• A
  $(A)$ Becquerel,who discovered natural radioactivity,belongs to France.
• B
  $(B)$ Marconi,who discovered wireless telegraphy,was an American.
• C
  $(C)$ Newton was an American,who discovered the laws of motion.
• D
  $(D)$ Einstein belongs to England,who simplified the laws of photoelectric effects.