单选题 An Enterprise Resource Planning (ERP) is built upon a commercial ______ that promises the seamless ______ of all the information flowing through the company—financial, accounting, human resources, supply chain and customer information. In implementation, all ERP systems include several features. The system is installed on a typical database management system. It requires initial setup according to the organization"s process, but it may be ______according to the organization"s unique process requirements through a tool set contained within the ERP applications. Using ERP, ______ can be prescribed to automate approval processes through established chains of commanD. One of the methods used to effect rapid implementation of the ERP system is to conduct concurrent ______ sessions during the early stages of ERP implementation.