What does it mean for a variable in the Application Editor to be defined as a parameter?（）

• A、The variable can be used to pass data to and from subflows.  
• B、The value for that variable can be supplied via Application Configuration in Application Administration.  
• C、The value for that variable is defined by the calling application.  
• D、The variable can be used in conditional steps.  
• E、The variable can be used to pass data to and from VoiceXML applications.