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').

Input: Consider 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

Output: b


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

Output: b


Input: Consider Input: Right lung has ____ lobes, left lung has two lobes.\Question: Choose the right answer from options given a) five b) no c) four d) three


Output: d