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').

Example Input: Firebrat eggs hatch in about ____ weeks.\Question: Choose the right answer from options given a) ten b) one c) two d) no
Example Output: c

Example Input: Notebooks are laptop computers that weigh between five and ____ pounds.\Question: Choose the right answer from options given a) ten b) seven c) nine d) one
Example Output: b

Example Input: Polymers are little crystals whcih absorb and retain ____ hundred times their weight in water.\Question: Choose the right answer from options given a) one b) four c) six d) five
Example Output:
b