The correct answer to this question is A, Blue. A kindergarten would likely be tested on this type of question. This is because, during their early learning stages, they begin to learn colors and the spelling of specific colors. Blue is one of the first colors that early learners become familiar with.
That is because blue is easily identifiable. When a baby looks up at the sky, they see the color blue. This color is also the main theme of many kids toys and the color associated with a new baby boy. Other colors a kindergarten would be able to identify would be red and green.