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: Trappers have ____ genders and reproduce sexually.\Question: Choose the right answer from options given a) zero b) two c) five d) one

Output: b


Input: Consider Input: Insects are arthropods that have a body with three segments, ____ legs, and one set of antennae.\Question: Choose the right answer from options given a) three b) one c) six d) zero

Output: c


Input: Consider Input: Scientists currently recognize ____ distinct types of killer whales.\Question: Choose the right answer from options given a) zero b) four c) nine d) two


Output: d