What does the "using" keyword do in the context of IDisposable objects in C#?

A. To define namespaces B. To declare variables C. To import external libraries D. To create instances of classes

A. Exits the switch statement B. Skips the current iteration C. Continues to the next iteration D. Throws an exception

A. public B. internal C. protected D. private

A. To declare a constant B. To prevent a variable from changing C. To allow a variable to be changed D. To declare a static variable