Which of the following statements about brain plasticity is correct ().

A、Brainplasticitycanhelphumansadapttocomplexandchangingenvironments;
B、Brainplasticityallowsthebraintorepairitselfundercertaincircumstances;
C、Plasticitymeansthatthebrainmaybeaffectedbypsychoactivesubstancesorpathologicalfactors;
D、Alloftheabove