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: Chlorine gives vinyl ____ advantages.\Question: Choose the right answer from options given a) six b) four c) two d) ten

Answer: c


Question: Nymphs feed and mature through five instars in about ____ to eight weeks.\Question: Choose the right answer from options given a) six b) five c) seven d) zero

Answer: a


Question: Tropical rainfall comprises more than ____ thirds of global rainfall.\Question: Choose the right answer from options given a) nine b) two c) six d) one

Answer:
b