In order to put an end to poverty, the World Bank has switched its ______to providing technical assistance and long-term loans to developing countries.

A．concern

B．process

C．struggle

D．focus

工资管理系统以职工姓名代码作为关键字，将固定工资数据和变动工资数据通过职工代码进行连接匹配，形成工资计算文件。 ( )