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: Most bioluminescence is blue for ____ reasons.\Question: Choose the right answer from options given a) seven b) two c) four d) zero

Output: b


Input: Consider Input: Tilt consists of ____ small surface vents.\Question: Choose the right answer from options given a) zero b) three c) seven d) no

Output: b


Input: Consider Input: Some snails can pull over ____ times their own body-weight.\Question: Choose the right answer from options given a) nine b) six c) five d) three


Output: d