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:
Baby elephants are usually dependent on mother s milk for at least ____ years.\Question: Choose the right answer from options given a) six b) three c) two d) seven

Ex Output:
b


Ex Input:
Couples often date from one to ____ years before getting engaged.\Question: Choose the right answer from options given a) three b) nine c) eight d) seven

Ex Output:
a


Ex Input:
Minerals are any substance with all of ____ specific qualities.\Question: Choose the right answer from options given a) one b) five c) four d) no

Ex Output:

c