What Has Research with Children Revealed About the Effects of Race

What has research with children revealed about the effects of race on susceptibility to the Müller-Lyer illusion?

A) The race of the children was not a factor in whether children were susceptible to the Müller-Lyer illusion.
B) Because eye pigmentation affects the visual detection of contours, children of different races responded differently to the Müller-Lyer illusion.
C) Children of different races in America are less susceptible to the Müller-Lyer illusion than are children from different races in Africa.
D) Children of different races in Africa were more susceptible to the Müller-Lyer illusion if they lived in rural areas of Africa.