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:
Bucks grow antlers each year that reach ____ to six feet in spread.\Question: Choose the right answer from options given a) seven b) one c) three d) five

Ex Output:
d


Ex Input:
Cleavage is good in ____ directions forming cubes.\Question: Choose the right answer from options given a) two b) three c) six d) zero

Ex Output:
b


Ex Input:
Shrubs are multi-stemmed woody plants, reaching a height of less than ____ metres at maturity.\Question: Choose the right answer from options given a) two b) three c) nine d) no

Ex Output:

b