Jesse's home life was extremely stressful and physically abusive until he was placed in foster care at the age of 6. Upon entering the first grade, it became apparent that Jesse suffered some learning and memory deficits

Which of the following would best explain these deficits?

The neurons in Jesse's brain are lacking myelination.
Jesse's hippocampus failed to develop correctly.
Jesse's hypothalamus is probably overdeveloped.
Jesse's corpus callosum is most likely thinner than it should

Jesse's hippocampus failed to develop correctly.