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: 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: Ground beef can last up to four months, and chicken parts can stay good for ____ months.\Question: Choose the right answer from options given a) ten b) no c) nine d) zero
Example Output: c

Example Input: Tesla coils are extremely dangerous and have killed ____ people.\Question: Choose the right answer from options given a) four b) ten c) zero d) three
Example Output:
d