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.

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.

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）