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').

Input: Consider Input: Some olive trees live to be ____ thousand years old.\Question: Choose the right answer from options given a) ten b) zero c) two d) seven

Output: c


Input: Consider Input: 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

Output: a


Input: Consider Input: Sabers use between one and ____ jewels to give their beam a specific frequency.\Question: Choose the right answer from options given a) nine b) two c) six d) three


Output: d