Answer:
A. the hippocampus is one of the last brain structures to mature
Explanation:
hippocampus is the part of brain which plays an important role in learning an d memory. AS infantile amnesia is the inability of the person to recall the events occurs between 2 to 4 years and also before the age of 10 with passage of time.
the fast birth of cells in the hippocampus during prenantal period and neurogenesis is responsible for having inability of long lasting memories.