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: Most children have a vocabulary of eight to ____ words, including names, by eighteen months of age.\Question: Choose the right answer from options given a) ten b) one c) seven d) eight

Output: a


Input: Consider Input: Laparoscopic surgery is performed via three or ____ small incisions in the abdomen.\Question: Choose the right answer from options given a) nine b) six c) five d) four

Output: d


Input: Consider Input: Beer is made from fermented grains and has an alcohol content of three to ____ percent.\Question: Choose the right answer from options given a) six b) no c) ten d) seven


Output: a