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:
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:
Prairie dogs bear four or ____ young per litter.\Question: Choose the right answer from options given a) five b) eight c) two d) zero

Ex Output:
a


Ex Input:
Essential tremor affects anywhere from one to ____ million people in the United States.\Question: Choose the right answer from options given a) nine b) five c) eight d) zero

Ex Output:

b