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:
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:
Fryers have ____ thermostats.\Question: Choose the right answer from options given a) five b) three c) two d) one

Ex Output:
c


Ex Input:
Caterpillars shed their skins ____ or five times as they grow, in a process called molting.\Question: Choose the right answer from options given a) zero b) four c) five d) one

Ex Output:

b