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: Quadrupeds are animals with ____ feet, such as cows.\Question: Choose the right answer from options given a) four b) six c) ten d) two

Output: a


Input: Consider Input: Facial features are smooth and very ____ dimensional.\Question: Choose the right answer from options given a) zero b) four c) ten d) three


Output: d