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]: Gestation lasts ____ months, with the birth of a single calf.\Question: Choose the right answer from options given a) three b) one c) six d) eight
[EX A]: d

[EX Q]: Younger children can produce as much as ____ times more saliva than adults.\Question: Choose the right answer from options given a) one b) ten c) five d) eight
[EX A]: d

[EX Q]: Pea Island is a typical barrier island habitat with ____ managed impoundments.\Question: Choose the right answer from options given a) seven b) two c) three d) ten
[EX A]:
c