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: Trains kill ____ people every year.\Question: Choose the right answer from options given a) zero b) three c) no d) four

Output: d


Input: Consider Input: Children are more likely than adults to show ____ symptoms even if they are infected.\Question: Choose the right answer from options given a) eight b) two c) no d) six

Output: c


Input: Consider Input: Insects go through either three or ____ stages.\Question: Choose the right answer from options given a) one b) five c) eight d) four


Output: d