In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[EX Q]: Allergic rhinitis is the most common allergic disease, with one in _ Canadian adults affected.
[EX A]: five

[EX Q]: Quinces begin to bear a year or _ after planting.
[EX A]: two

[EX Q]: Snakeheads can breathe air and can survive out of water for up to _ days.
[EX A]:
four