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: Marriage is the legal union of ____ people.\Question: Choose the right answer from options given a) one b) no c) five d) two

Output: d


Input: Consider Input: Mechanical stability comes from having fused quartz, in ____ gravity, cold.\Question: Choose the right answer from options given a) five b) zero c) six d) two

Output: b


Input: Consider Input: All loci have ____ or two alleles.\Question: Choose the right answer from options given a) no b) six c) four d) one


Output: d