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]: Prairie dogs bear four or ____ young per litter.\Question: Choose the right answer from options given a) five b) eight c) two d) zero
[EX A]: a

[EX Q]: Women are ____ times as likely as men are to develop osteoporosis.\Question: Choose the right answer from options given a) zero b) four c) one d) nine
[EX A]: b

[EX Q]: Humans have ____ sides to their brain functions.\Question: Choose the right answer from options given a) two b) no c) zero d) three
[EX A]:
a