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]: Insects are arthropods that have a body with three segments, ____ legs, and one set of antennae.\Question: Choose the right answer from options given a) three b) one c) six d) zero
[EX A]: c

[EX Q]: Righteousness always points in ____ directions.\Question: Choose the right answer from options given a) six b) two c) one d) four
[EX A]: b

[EX Q]: Polymers are the large macromolecules composed of ____ to millions of monomer subunits.\Question: Choose the right answer from options given a) zero b) nine c) three d) no
[EX A]:
c