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: 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: Earthworms have ____ pairs of hearts.\Question: Choose the right answer from options given a) seven b) five c) one d) no

Output: b


Input: Consider Input: Rats can jump three feet in the air from a flat surface and leap ____ feet horizontally.\Question: Choose the right answer from options given a) zero b) three c) nine d) four


Output: d