目前，发达资本主义国家面临的主要社会问题有（）

A.民主的危机与讽刺问题

B.种族歧视和种族矛盾与极端民族主义问题

C.精神和信仰危机问题

D.老人和妇女问题

E.城市暴力、黑社会和艾滋病蔓延等问题

(71) analysis emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems. Ultimately, the system models become the (72) for designing and constructing an improved system. (73) is such a technique. The emphasis in this technique is process-centered. Systems analysts draw a series of process models called (74) . (75) is another such technique that integrates data and process concerns into constructs called objects.

（73）是（）

A. Structured analysis

B. Information Engineering

C. Discovery Prototyping

D. Object-Oriented analysis