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').

[Q]: Birds have ____ eyes.\Question: Choose the right answer from options given a) eight b) five c) nine d) two
[A]: d


[Q]: Indian reservations are part of five of the nation's ____ poorest counties.\Question: Choose the right answer from options given a) seven b) nine c) ten d) two
[A]: c


[Q]: Bronze is made by mixing three parts copper to ____ part tin.\Question: Choose the right answer from options given a) seven b) one c) nine d) six
[A]:
b