Identify the letter of the choice that best matches the phrase or definition.

A. A benefit of using these is that the variables defined in one can be hidden from processing in others
B. Property that determines which object on a form receives the focus when the user presses the TAB key
C. A major contributor to reliable and robust programs
D. If this property is less than 0, then a selection has not been made
E. This can inherit procedures within the base class
F. Means that a subclass can contain a procedure with the same procedure name
G. A class acts as a template for this
H. You must use multiple classes to implement this kind of program structure
I. Can be used to write a stream of text to a file
J. Variables declared in a base class are available for use in a subclass through this

A. classes
B. TabIndex
C. encapsulation
D. SelectedIndex
E. subclass
F. Overridable
G. object
H. three-tier
I. StreamWriter
J. inheritance