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]: Whales are divided into ____ categories, based on their teeth.\Question: Choose the right answer from options given a) two b) four c) nine d) ten
[EX A]: a

[EX Q]: Most roots require from three to ____ weeks to dry sufficiently to be safe.\Question: Choose the right answer from options given a) seven b) five c) three d) six
[EX A]: d

[EX Q]: Kieffer pears require ____ to three weeks to ripen.\Question: Choose the right answer from options given a) no b) two c) six d) nine
[EX A]:
b