单选题 Accelerated analysis approaches emphasize the construction of ______ to more rapidly identify business and user requirements for a new system. As an accelerated analysis technology, ______ reads the program code and automatically generates the equivalent system model, and the code can be obtained from ______. All system analysis approaches require some form of ______ which includes those techniques to be used to identify or extract system problems and solution requirements from user community. ______ is a classical set of techniques used to collect information about system problems, opportunities, solution requirements, and priorities.