Given a sentence with a missing word, pick the answer option that best fills out the missing word in the sentence. Indicate each answer with its index ('a', 'b', 'c', 'd').

[Q]: Control is defined as a dead plant with ____ signs of life.\Question: Choose the right answer from options given a) ten b) nine c) no d) zero
[A]: c

[Q]: Wind is renewable, and produces ____ emissions or by-products.\Question: Choose the right answer from options given a) five b) nine c) zero d) no
[A]: d

[Q]: Sound waves travel about ____ times as fast in water and about ten times as fast in steel.\Question: Choose the right answer from options given a) four b) three c) seven d) eight
[A]:
a