Explanation:
The ants choosing the blue sugar over the red sugar isn't a matter of color, but it'd a matter of sugar content.
The ants chose the blue sugar because it has more sugar content than the red sugar.
Hope it helps.
20% sames more like the answer than the other three. But I'm considering that it could be 50%, but, it doesn't convince me. So, I'd say: C. 20%
