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: Molecules are ____ or more atoms stuck together.\Question: Choose the right answer from options given a) two b) zero c) six d) eight
Example Output: a

Example Input: Mares abort suddenly without signs of illness, and the fetus shows ____ signs of degenerative change.\Question: Choose the right answer from options given a) zero b) no c) seven d) ten
Example Output: b

Example Input: Plants go through ____ stages of dormancy.\Question: Choose the right answer from options given a) six b) seven c) two d) zero
Example Output:
c

