Analyze Figure 6

Analyze figure 6.11 and the text dealing with retinoid recycling and the light path through the retina. What arguments does the author present that might argue against the idea that the retina is suboptimal in its design because of its "backward" arraignment?

A) The outer segments of photoreceptors require blood flow, and red blood cells would prevent light from reaching the retina if capillaries were in the light path.
B) Cones are more dense at the periphery of the fovea, which allows scattered light to be detected.
C) Specialized glial cells channel light toward the photoreceptors
D) All of the above