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: Obesity is, in general, the result of personal choices and poses ____ risk of communication.\Question: Choose the right answer from options given a) four b) six c) zero d) seven

Output: c


Input: Consider Input: Herbs have ____ major functions.\Question: Choose the right answer from options given a) three b) two c) ten d) one


Output: a