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]: Vaccinated newborns have protection for at least ____ years.\Question: Choose the right answer from options given a) four b) five c) two d) no
[EX A]: b

[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]: Flowers are like the ____ letter L word.\Question: Choose the right answer from options given a) no b) five c) four d) six
[EX A]:
c