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 Input:
Redwoods reproduce ____ ways.\Question: Choose the right answer from options given a) zero b) two c) six d) nine

Ex Output:
b


Ex Input:
Poodles have ____ legs.\Question: Choose the right answer from options given a) one b) four c) six d) nine

Ex Output:
b


Ex Input:
Insects have ____ pairs of legs and three body segments.\Question: Choose the right answer from options given a) one b) nine c) no d) three

Ex Output:

d