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: Baby elephants are usually dependent on mother s milk for at least ____ years.\Question: Choose the right answer from options given a) six b) three c) two d) seven

Output: b


Input: Consider Input: Many soils have ____ major layers or horizons, top soil, subsoil and parent material.\Question: Choose the right answer from options given a) one b) two c) seven d) three

Output: d


Input: Consider Input: Dogs can begin gundog training as early as ____ months of age.\Question: Choose the right answer from options given a) one b) nine c) six d) eight


Output: c