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]: Food waste is transformed into soil-like humus in ____ to seven days.\Question: Choose the right answer from options given a) ten b) five c) zero d) three
[EX A]: d

[EX Q]: China is reportedly in the top ____ nations in industrial output.\Question: Choose the right answer from options given a) seven b) ten c) three d) five
[EX A]: b

[EX Q]: Swans have black webbed feet with ____ strongly nailed toes.\Question: Choose the right answer from options given a) three b) one c) two d) seven
[EX A]:
a