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:
Material culture is the realm of ____ dimensional objects that make up our everyday environment.\Question: Choose the right answer from options given a) ten b) three c) six d) four

Ex Output:
b


Ex Input:
Cleavage is perfect in ____ directions, prismatic.\Question: Choose the right answer from options given a) two b) nine c) three d) seven

Ex Output:
a


Ex Input:
Hot weather lowers reproductive efficiency in ____ ways.\Question: Choose the right answer from options given a) three b) four c) nine d) two

Ex Output:

d