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: Sculpture involves the ____ different processes of carving and modeling.\Question: Choose the right answer from options given a) five b) three c) two d) ten
Example Output: c

Example Input: Ozone is a naturally occurring molecule containing ____ atoms of oxygen.\Question: Choose the right answer from options given a) three b) five c) nine d) eight
Example Output: a

Example Input: Most scientists currently recognize seven living species of sea turtles grouped into ____ genera.\Question: Choose the right answer from options given a) one b) zero c) six d) no
Example Output:
c