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:
Hamsters can live to be three to ____ years old.\Question: Choose the right answer from options given a) four b) two c) three d) nine

Ex Output:
a


Ex Input:
Carbon can bond to a maximum of ____ atoms.\Question: Choose the right answer from options given a) six b) ten c) five d) four

Ex Output:
d


Ex Input:
Peppers require at least ____ hours of sun a day.\Question: Choose the right answer from options given a) no b) six c) eight d) seven

Ex Output:

b