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Discussion

Sometimes the greatest inventions ___________ an idea of startling simplicity.

  • A.stumbles upon
  • B.hinge upon
  • C.starves without
  • D.lacks

Answer: B

Correct answer: hinge upon

Hinge upon means to depend entirely on, which is what an invention does when its whole force comes from one simple idea.

Stumbles upon means to find by accident and takes a person as subject, starves without is not idiomatic here, and lacks would say the invention has no such idea.

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