以下哪条信令消息可以判断PSce11变更为站间辅站小区变更准备成功?

以下哪条信令消息可以判断PSce11变更为站间辅站小区变更准备成功?

A.SgNB Modi fication Request Acknowledge

B.SgNB Modification Required

C.SgNB Addition Request Acknow ledge

D.SgNB Change Required

正确答案是C