You are creating a Windows Forms application for the design of circuit boards and electronic equipment. You use the .NET Framework 3.5 to create the application x that allows designers to preview designs before printing them.The previewed documents must meet the following requirements：  
（1）The graphics and text are displayed clearly.  
（2）The fullscale preview is set as default for the documents.  
（3）The zoom setting of the preview control is adjusted automatically when the form is resized.   
You need to ensure that the requirements are met when the form that contains the custom print preview control is displayed.  
Which code segment should you use？（）

You are creating a Windows Forms application by using the .NET Framework 3.5. The application is configured to use rolebased security.You need to ensure that users can print reports only by selecting a printer from the printer dialog box. You want to achieve this goal by using the minimum level of permission.  
Which code segment should you use？（）