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:
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:
Children now account for only ____ percent of all forest fires caused in the United States.\Question: Choose the right answer from options given a) five b) four c) eight d) nine

Ex Output:
b


Ex Input:
Many babies get pimples on their face, scalp, and chest at three to ____ weeks of age.\Question: Choose the right answer from options given a) one b) ten c) six d) zero

Ex Output:

c