NO LINKS OR ELSE YOU'LL BE REPORTED!Only answer if you're very good at English. Read the dictionary entry.

Foolproof (adj): 1 designed to function despite human error 2 without possibility of failure

Which sentence uses the word foolproof as described by the second definition?

A: The defense lawyer concluded his remarks with a foolproof argument of the defendant's innocence.

B: Scientists were certain that despite being out of their control, the space probe would be foolproof.

C: The new computers were not foolproof in the hands of untrained users.

D: Foolproof methods of transportation may become a reality in the near future.
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