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:
Photosynthesis occurs in ____ phases.\Question: Choose the right answer from options given a) four b) two c) nine d) five

Ex Output:
b


Ex Input:
Stringers consist of ____ narrow pieces of wood glued together.\Question: Choose the right answer from options given a) ten b) three c) five d) seven

Ex Output:
b


Ex Input:
Women live on average ____ years more than men.\Question: Choose the right answer from options given a) zero b) four c) seven d) two

Ex Output:

c