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').

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

[EX Q]: Tribal peoples teach that there are ____ parts to any ceremony, each equally important.\Question: Choose the right answer from options given a) four b) nine c) ten d) seven
[EX A]: a

[EX Q]: Immature scorpions molt an average of ____ times before maturity.\Question: Choose the right answer from options given a) one b) six c) ten d) no
[EX A]:
b