Which methods allow COM components to be used in .NET applications？（）

A. Add a reference to the component throudh Microsoft Visual Studio 2005.
B. Use the type Library Import tool （TlbImport.exe）.
C. Use the Regsvr32 tool.
D. Ensure thet the application is registered， using the RegSvr tool if necessary. Then either add a reference to it from dialog box or use TblIpm.exe.