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: Sea stars have ____ arms, or rays, connected to a small round body.\Question: Choose the right answer from options given a) five b) six c) seven d) no

Output: a


Input: Consider Input: People can go without food for up to about ____ weeks.\Question: Choose the right answer from options given a) three b) one c) nine d) four

Output: a


Input: Consider Input: Spring comes from ____ different layers.\Question: Choose the right answer from options given a) four b) no c) five d) one


Output: c