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').

Example Input: Hypertension affects nearly one in ____ adults.\Question: Choose the right answer from options given a) three b) seven c) five d) zero
Example Output: a

Example Input: Minks travel more than most furbearers, covering up to ____ miles a night.\Question: Choose the right answer from options given a) four b) five c) zero d) ten
Example Output: d

Example Input: Flatbed scanners can also record ____ dimensional objects of many sizes and shapes.\Question: Choose the right answer from options given a) eight b) one c) four d) three
Example Output:
d