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: All butterflies go through ____ life stages .\Question: Choose the right answer from options given a) one b) four c) zero d) five

Output: b


Input: Consider Input: Many people have ____ symptoms until they suffer chest pains or a heart attack.\Question: Choose the right answer from options given a) three b) one c) no d) seven

Output: c


Input: Consider Input: Sleep apnea is defined as the cessation of breathing for ____ or more seconds during sleep.\Question: Choose the right answer from options given a) eight b) four c) ten d) six


Output: c