若要扩展SoTowerBPM的组织机构，则应当实现的组织机构接口和权限接口是下面哪两个()

A、com.eos.workflow.api.IWFActivityInstManager

B、com.eos.workflow.omservicE.IWFPermissionService

C、com.eos.workflow.omservicE.IWFOMService

D、com.eos.workflow.api.IWFDefinitionDeployeeManager