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: Government buildings fly flags of the ____ nations.\Question: Choose the right answer from options given a) ten b) no c) seven d) two

Output: d


Input: Consider Input: Sound waves travel through the air in a similar manner, but in all ____ dimensions.\Question: Choose the right answer from options given a) three b) five c) nine d) one

Output: a


Input: Consider Input: Baleen whales have ____ nostrils, or blowholes.\Question: Choose the right answer from options given a) three b) zero c) seven d) two


Output: d