The development of new neurons in adult brains can be described by the following except?

The development of new neurons in adult brains can be described by the following EXCEPT:

A ) adult brains are capable of major adaptation.
B ) adult brains are not as plastic as developing brains.
C ) adult brains are set in their own ways.
D ) new neurons created in adult brains can be integrated into existing neural circuits
E ) new neurons created in adult brains can be influenced by the environment or behavior of the organism