【单选题】

The main idea of the passage is that
A．(A) explanations of the process by which higher organisms explain themselves have remained elusive until now

B．(B) self-amplifying activation processes may one day explain most natural processes
C．(C) scientists have discovered the first proof of Turing patterns to higher organism communities
D．(D) explanations of how organisms organize themselves into patterns are no longer so elusive as they once were
E．(E) activation processes are essential to the survival of many ant species