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: Conflict occurs between when ____ people have a car accident.\Question: Choose the right answer from options given a) no b) eight c) two d) nine
Example Output: c

Example Input: Chimeras are ____ headed creatures that shoot fire from all three heads, damaging a wide area.\Question: Choose the right answer from options given a) three b) one c) eight d) six
Example Output: a

Example Input: Nondurable goods are items generally with a normal life expectancy of less than ____ years.\Question: Choose the right answer from options given a) four b) one c) zero d) three
Example Output:
d