下列名句中，画线的成语使用恰当的一句是（  ）

A．楼市面临的政策风险、资金风险、泡沫风险，已成为压在房地产市场上的“三座大山”，监管部门对风险的判断要亦步亦趋。

B．喜欢在洁白的墙上笔走龙蛇、写字题诗，已成为我们中国人一种奇怪的积习，也不知此风起于何时，始作俑者为谁。

C．航天科技战线全体成员上下其手共同努力，“神七”成功发射，宇航员完美实现太空行走，使得中国人的民族自豪感空前的增强。

D．贪官锒铛入狱后，无所事事之余，玩起了出书，但从他们已经出版的书籍内容看，很多人都是在藉此回忆昔日人生的辉煌，真正悔过自新的却是凤毛麟角。

The analysis phase answers the questions of who will use the system，what the system will do，and where and when it will be used．During this phase，the project team investigates any current system，identifies （），and develops a concept for the new system．This phase has three steps：first，（）is developed to guide the project team’s efforts．It usually includes an analysis of the current system and its problems，and the ways to design a new system．The next step is （）．The analysis of this information-in conjunction with input from the project sponsor and many other people-leads to the development of a concept for a new system．The system concept is then used as a basis to develop a set of business analysis models that describes how the business will operate if the new system were developed．The set of models typically includes models that represent the （） necessary to suppor the underlying business process．Last，the analyses，system concepts，and models are combinedin to a document called the （），which is presented to the project sponsor and other key decision makers that decide whether the project should continue to move forward．

The next step is （）．

A．project scope definition

B．problems analysis

C．decision analysis

D．requirements gathering