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:
Takins can even balance on their hind hooves to nibble on vegetation ____ feet above ground.\Question: Choose the right answer from options given a) two b) no c) nine d) eight

Ex Output:
d


Ex Input:
Islamic practice is based on what are called the ____ pillars of faith.\Question: Choose the right answer from options given a) eight b) one c) five d) four

Ex Output:
c


Ex Input:
Massage raises skin temperature between four and ____ degrees, and even higher among women.\Question: Choose the right answer from options given a) eight b) zero c) five d) four

Ex Output:

c