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: Paleontologists specialize in ____ main areas.\Question: Choose the right answer from options given a) eight b) five c) no d) six
Example Output: b

Example Input: Black bears stand ____ to six feet long and almost three feet at the shoulders when on all fours.\Question: Choose the right answer from options given a) three b) five c) four d) one
Example Output: b

Example Input: Jaguars have ____ to four babies that live for about twelve to sixteen years.\Question: Choose the right answer from options given a) one b) seven c) nine d) no
Example Output:
a