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:
Electrolytic capacitors have a finite lifetime, usually about ____ years.\Question: Choose the right answer from options given a) zero b) ten c) four d) eight

Ex Output:
b


Ex Input:
Plants can uptake ____ times more nutrients, and improve soil texture at the same time.\Question: Choose the right answer from options given a) no b) two c) three d) ten

Ex Output:
d


Ex Input:
Brazil is among the top ____ producers of sugar cane.\Question: Choose the right answer from options given a) three b) five c) two d) zero

Ex Output:

a