Which of the Following General Principles Can Be Gleaned from Developmental

Which of the following general principles can be gleaned from developmental studies of the visual system in vertebrates?

A) Connection specificity that distinguishes discrete cell types is more likely to be determined by molecular cues.
B) Connection specificity that chooses between similar cells tends to involve neuronal activity and competition.
C) Initial targeting by neuronal processes tends to be activity-independent.
D) Refinement of neuronal processes tends to be activity-dependent.
E) All of the above