Which of the following settings will reduce packet overhead and overall latency in a standalone point-to-point bridge deployment？（）

A.enable concatenation on the non-root bridge only

B.enable concatenation on the root bridge only

C.enable concatenation on both the root bridge and non-root bridge

D.enable concatenation on the root bridge and set it as desirable on the non-root bridge

E.set concatenation as desirable on the root bridge and enable it on the non-root bridge