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').

[EX Q]: Cougars have ____ toes with three distinct lobes present at the base of the pad.\Question: Choose the right answer from options given a) no b) four c) eight d) zero
[EX A]: b

[EX Q]: Ozone is a naturally occurring molecule containing ____ atoms of oxygen.\Question: Choose the right answer from options given a) three b) five c) nine d) eight
[EX A]: a

[EX Q]: All animals survive and respond to the environment in ____ different ways.\Question: Choose the right answer from options given a) four b) one c) seven d) five
[EX A]:
c