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The U.S. has sent unmanned spacecraft to _____ the planets in our solar system. A. all B. most C. some D. none of

Respuesta :

Answer:  A. all

Every planet in our solar system has been visited by an unmaned spacecraft sent by the United States. The launch years are given in this order

  • Venus (1962)
  • Mars (1964)
  • Mercury (1973)
  • Jupiter (1977)
  • Saturn (1977)
  • Uranus (1977)
  • Neptune (1977)
  • Pluto (2006)

Answer:c some

Explanation:

only a couple of planets have had unmanned spacecraft sent to them

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