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: Double price is based on two golfers sharing ____ room.\Question: Choose the right answer from options given a) one b) zero c) six d) nine

Output: a


Input: Consider Input: Many animals use two or ____ forest structure types.\Question: Choose the right answer from options given a) eight b) zero c) two d) three

Output: d


Input: Consider Input: Plesiosaurs fall into ____ groups.\Question: Choose the right answer from options given a) five b) seven c) four d) two


Output: d