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:
Argentine ants are able to establish new colonies with as little as ____ worker ants and one queen.\Question: Choose the right answer from options given a) no b) two c) ten d) five

Ex Output:
c


Ex Input:
Cancer is the second leading cause of death in Georgia, accounting for one in ____ deaths each year.\Question: Choose the right answer from options given a) nine b) zero c) five d) four

Ex Output:
d


Ex Input:
Sockeye salmon return to their natal stream to spawn after spending ____ to four years in the ocean.\Question: Choose the right answer from options given a) eight b) four c) nine d) one

Ex Output:

d