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]: Aridity presents ____ main obstacles to solitary behavior.\Question: Choose the right answer from options given a) no b) three c) two d) five
[EX A]: c

[EX Q]: Illiteracy is ____ percent higher among women than men.\Question: Choose the right answer from options given a) seven b) six c) zero d) five
[EX A]: a

[EX Q]: Butterflies have ____ legs and three body sections and they fly.\Question: Choose the right answer from options given a) no b) three c) one d) six
[EX A]:
b