1.The application will run correctly and will use the settings in the Web.config file, ignoring theMachine.config settings
2.The application will run correctly and will use the settings in the Machine.config file, ignoring the Web.config settings
3.The application will not run correctly until you either remove the Web.config file or delete the settings from the Machine.config file
4.The application will run correctly, using only the settings that are identical in the Web. configand Machine.config files