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: Ladybugs have ____ legs and keep their wings tucked away until they are ready to fly.\Question: Choose the right answer from options given a) six b) eight c) one d) zero
Example Output: a

Example Input: Black women die from cervical cancer at ____ times the rate of white women.\Question: Choose the right answer from options given a) five b) one c) two d) three
Example Output: d

Example Input: Meat production requires ____ times as much land per calorie as grain or beans.\Question: Choose the right answer from options given a) ten b) nine c) four d) three
Example Output:
a