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: Amelia Island is the only territory in American history to serve under ____ flags.\Question: Choose the right answer from options given a) eight b) no c) six d) five

Output: a


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: Oxygen exists in all ____ forms - liquid, solid, and gas.\Question: Choose the right answer from options given a) nine b) three c) four d) six


Output: b