Mark the correct statement about using strings in Jack:

The dispose$()$ method of the String class is called automatically by the Jack compiler $($when the string is no longer needed$).$

The dispose$()$ method of the String class should be called for every declaration of a String variable $($when the variable is no longer needed$).$

The dispose$()$ method of the String class should be called for every call to the String class constructor $($when the string is no longer needed$).$

A String variable is only a reference. When the method returns, it is destroyed automatically. The string object, however, is created by the constructor, and must be recycled explicitly using a call to the dispose method.