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: Cyclic neutropenia tends to occur every three weeks and last ____ to six days at a time.\Question: Choose the right answer from options given a) six b) four c) five d) three

Output: d


Input: Consider Input: Altimetric satellites are usually limited life missions lasting approximately three to ____ years.\Question: Choose the right answer from options given a) five b) ten c) four d) eight

Output: b


Input: Consider Input: Rabbits have unusual abilities-many can leap ____ feet or more.\Question: Choose the right answer from options given a) seven b) zero c) three d) ten


Output: d