According to the article "The Early Days of World War I," what benefit do the irregular patterns on zebras and giraffes have?
a) This "razzle-dazzle" confuses their enemies and disrupts their aim.
b) These animals are easy to spot, but these irregular patterns make them hard to track.
c) It makes them difficult to see when they are moving.
d) It is a different form of camouflage that helps to blend them into their backgrounds.