按照人民银行要求，参与支票影像交换系统的各银行机构可采取分散接入模式或集中接入模式。目前我行采取的是（）模式。

The work breakdown structure(WBS) used in the classical sense is a practical methodology used for ______.

A) adding activities to the project
B) expanding the scope of the project
C) developing a responsibility matrix for work assignments
D) delineating project work effort into discrete and logical sub-elements