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:
Grasshoppers can fly at speeds up to ____ miles per hour.\Question: Choose the right answer from options given a) eight b) seven c) two d) nine

Ex Output:
a


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:
Sunlight causes skin cancers in ____ ways.\Question: Choose the right answer from options given a) zero b) six c) two d) no

Ex Output:

c