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]: Mothers usually give birth to one, two, or ____ babies at a time.\Question: Choose the right answer from options given a) three b) zero c) five d) ten
[EX A]: a

[EX Q]: Nymphs are slow growing and can take ____ months or more to become adults.\Question: Choose the right answer from options given a) seven b) two c) eight d) nine
[EX A]:
d