Each of the following sentences is followed by four words or group of words. Fill in the blanks with the appropriate word or group of words.
Sometimes the greatest inventions ___________ an idea of startling simplicity.
A. stumbles upon
B. hinge upon
C. starves without
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Correct Answer : B.
The speaker is talking about how sometimes the greatest inventions are formed on or depend on simple ideas or basic thoughts. Option (b) is the correct option because it means to depend on, which fits in perfectly with the statement as then it would mean that some of the greatest inventions depend on simplistic ideas.