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]: Honeybees have ____ jobs.\Question: Choose the right answer from options given a) ten b) one c) three d) two
[EX A]: d

[EX Q]: Cats have ____ toes on their front paws, but only four touch the ground when walking.\Question: Choose the right answer from options given a) six b) nine c) five d) zero
[EX A]: c

[EX Q]: Heart has ____ extreme states at each cardiac cycle.\Question: Choose the right answer from options given a) two b) six c) five d) nine
[EX A]:
a