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]: Insects have ____ common types of metamorphosis.\Question: Choose the right answer from options given a) six b) eight c) two d) seven
[EX A]: c

[EX Q]: Amelia Island is the only territory in American history to serve under ____ flags.\Question: Choose the right answer from options given a) eight b) no c) six d) five
[EX A]: a

[EX Q]: Carpenter ants make ____ types of nests.\Question: Choose the right answer from options given a) two b) seven c) three d) eight
[EX A]:
a