TASK DEFINITION: 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').
PROBLEM: 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

SOLUTION: a

PROBLEM: Cyclic neutropenia tends to occur every three weeks and last ____ to six days at a time.\Question: Choose the right answer from options given a) six b) four c) five d) three

SOLUTION: d

PROBLEM: White coloring begins to appear when the birds approach ____ years of age.\Question: Choose the right answer from options given a) four b) seven c) one d) eight

SOLUTION:
a