Failure of an embryonic neuron to establish a synaptic connection ...

[Millan]

Failure of an embryonic neuron to establish a synaptic connection to another cell
A) converts that neuron to an ependymal cell.
B) causes the neuron to migrate to another part of the brain.
C) converts that neuron to a glial cell.
D) leads to Alzheimer's disease.
E) results in the apoptosis of that neuron.

[Celeste]

D