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

[EX Q]: Giraffes have two horns and _ or three knobs.
[EX A]: two

[EX Q]: Nymphs feed for five to _ weeks before entering the adult stage.
[EX A]: eight

[EX Q]: High resolution has _ main effects on a viewable image.
[EX A]:
two