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').
--------
Question: Dispassion is a ____ edged sword.\Question: Choose the right answer from options given a) six b) two c) zero d) four

Answer: b


Question: Background radiation comes from ____ sources.\Question: Choose the right answer from options given a) zero b) three c) four d) no

Answer: b


Question: Livestock remove less than ____ percent of the forages' phosphorus and potassium.\Question: Choose the right answer from options given a) eight b) ten c) one d) five

Answer:
b