In requirements engineering, requirements elicitation is the practice of collecting the requirements of a system from users, customers and other stakeholders. In the following practices, ( ) is rarely used in requirements elicitation.

单项选择题（ ）is a collection of data sets, which is so large and complex that it becomes difficult to process using on-hand database management tools or traditional data processing applications.

A. Big data
B. Cluster
C. Parallel computing
D. Data warehouse

单项选择题( ) is the process of documenting, analyzing, tracing, prioritizing and agreeing on requirements and then controlling change and communicating to relevant stakeholders. It is a continuous process throughout a project.

A. Integrated management
B. Configuration management
C. Scope management
D. Requirements management

单项选择题下图中，从A到E的最短长度是（）（图中每条边旁的数字为该条边的长度）

A、17 
B、18 
C、19 
D、20

单项选择题某部门有3个生产同类产品的工厂（产地），生产的产品由4个销售点（销地）出售，各工厂的生产量（单位：吨）、各销售点的销售量（单位：吨）以及各工厂到各销售点的单位运价（百元 吨）示于表4中。 适当安排调运方案，最小总运费为（）

A、450 
B、455 
C、460 
D、465

单项选择题某厂编号为Ⅰ、Ⅱ、Ⅲ的三种产品分别经过A、B、C三种设备加工，已知生产各种产品每件所需的设备台时，各种设备的加工能力（台时）及每件产品的预期利润见表3 适当安排生产计划可获得最大总利润（）元

A、2000/3 
B、2100/3 
C、2200/3 
D、2250/3