I really have no idea__ with her.A.what was the matter B.what the matter was.请问选A对吗?

I really have no idea__ with her.A.what was the matter B.what the matter was.请问选A对吗?
有人觉得：“what 在从句中作主语，且与the matter是同指的”。那么宾语从句的引导词在从句中作主语的话，还保留原来的语序。