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: Poles CAN occur at ____ frequency.\Question: Choose the right answer from options given a) six b) four c) zero d) eight

Output: c


Input: Consider Input: Elk retain their antlers for more than ____ months of the year.\Question: Choose the right answer from options given a) nine b) ten c) six d) seven

Output: c


Input: Consider Input: Deforestation affects biological diversity in ____ ways.\Question: Choose the right answer from options given a) six b) seven c) one d) three


Output: d