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: Earwigs produce ____ or two generations every year.\Question: Choose the right answer from options given a) two b) no c) one d) nine

Output: c


Input: Consider Input: Calves are born ____ and a half months after mating.\Question: Choose the right answer from options given a) six b) ten c) eight d) two

Output: c


Input: Consider Input: Tropical rainforests exist on ____ continents.\Question: Choose the right answer from options given a) five b) four c) one d) zero


Output: b