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:
Most internal parasites are specific to one or ____ species.\Question: Choose the right answer from options given a) seven b) three c) two d) five

Ex Output:
c


Ex Input:
Bulls can stand as tall as ____ feet at the shoulders.\Question: Choose the right answer from options given a) one b) five c) seven d) four

Ex Output:
b


Ex Input:
Cleavage is poor in ____ directions parallel to the faces of the rhombohedron.\Question: Choose the right answer from options given a) three b) seven c) one d) ten

Ex Output:

a