The Rational Unified Process (RUP) is a software engineering process, which captures many of best practices in modern software development. The notions of (21) and scenarios have been proven to be an excellent way to capture function requirements. RUP can be described in two dimensions - time and content. In the time dimension, the software lifecycle is broken into cycles. Each cycle is divided into four consecutive (22) which is concluded with a well-defined (23) and can be further broken down into (24) - a complete development loop resulting in a release of an executable product, a subset of the final product under development, which grows incrementally to become the final system. The content structure refers to the disciplines, which group (25) logically by nature.

A．artifacts

B．use-cases

C．actors

D．workers

下面哪项不是船公司的保安责任（）。

A．任命CSO和SSO

B．确保向CSO、船长、SSO提供必要的支持

C．确保船长获得并在船上保存与租船合同各方的联系细节资料

D．规定船舶保安等级