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: Control is defined as a dead plant with ____ signs of life.\Question: Choose the right answer from options given a) ten b) nine c) no d) zero
Example Output: c

Example Input: Bloody diarrhea lasts for two to ____ days.\Question: Choose the right answer from options given a) nine b) five c) three d) no
Example Output: b

Example Input: Cattle have a stomach with ____ compartments.\Question: Choose the right answer from options given a) four b) five c) seven d) one
Example Output:
a