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 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
[EX A]: c

[EX Q]: Woodchucks produce about ____ young and virtually all females breed annually.\Question: Choose the right answer from options given a) ten b) four c) no d) six
[EX A]: b

[EX Q]: Some autoimmune diseases fall between the ____ types.\Question: Choose the right answer from options given a) five b) ten c) one d) two
[EX A]:
d