You are developing a Windows Presentation Foundation (WPF) application.
You are implementing a test strategy for the application.
You need to ensure that the test class can repeat user input.
From which base class should the test class inherit?（）

The strategies for handling risk comprise of two main types: negative risks, and positive risks. The goal ofthe plan is to minimize threats and maximize opportunities. When dealing with negative risks, there are three main response strategies（）,rransfer ,Mitigate.

Quality planning tools are often used to help plan effective quality management activities . （）is one of such tools, which involves company actual or planned project practices to those or other projects to generate ideas for improvement and to provide a basis by which to measure performance.