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: National forests have regulations that restrict ____ wheeler use to established roads.\Question: Choose the right answer from options given a) no b) four c) six d) nine

Output: b


Input: Consider Input: Islamic practice is based on what are called the ____ pillars of faith.\Question: Choose the right answer from options given a) eight b) one c) five d) four

Output: c


Input: Consider Input: Autism is ____ times more common in boys than girls.\Question: Choose the right answer from options given a) three b) ten c) two d) zero


Output: a