439. It is a special feature of cell aggregation in the developing nervous system that in most regions of the brain the cells not only adhere to one another and also adopt some preferential orientation.
(A) to one another and also adopt
(B) one to the other, and also they adopt
(C) one to the other, but also adopting
(D) to one another but also adopt
(E) to each other, also adopting
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