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:
Vaporization can occur in temperatures as low as ____ degrees.\Question: Choose the right answer from options given a) one b) zero c) eight d) two

Ex Output:
b


Ex Input:
Female cats have ____ X's in each cell.\Question: Choose the right answer from options given a) five b) two c) one d) ten

Ex Output:
b


Ex Input:
Port is Portugal's best known wine, it represents about ____ percent of the wine production.\Question: Choose the right answer from options given a) three b) seven c) six d) two

Ex Output:

c