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:
Angiosperms inhabit all ____ continents, as well as the oceans.\Question: Choose the right answer from options given a) five b) seven c) three d) zero

Ex Output:
b


Ex Input:
Vaccination typically occurs at ____ to eight weeks of age in kittens.\Question: Choose the right answer from options given a) three b) nine c) six d) no

Ex Output:
c


Ex Input:
Sharks can have from ____ to seven gills.\Question: Choose the right answer from options given a) eight b) zero c) five d) nine

Ex Output:

c