The Study of the Dynamics of Engram Formation by Kaoru

The study of the dynamics of engram formation by Kaoru Inokuci's group revealed that _______. (Select all that apply.)

A) Hebb's reverberatory trace idea was false
B) engram cells fired more repetitively than the non-engram cells
C) all cells active at the time of the learning experience remained active for several hours after training
D) some cell clusters activated by the learning experience did not persist over the sleep period
E) only subensembles active during sleep were activated during retrieval