The ________ control is probably the most common control for which you need to write code

Layers of information can be presented simultaneously by using ________ backgrounds

Fill in the blank(s) with correct word

Which of the following statements is (are) true?

A. We can use inheritance to customize existing software. B. A base class specifies commonality. C. A base class can be modified without modifying derived classes D. A derived class can be modified without modifying its derived class. a) All of the above b) None of the above c) A, B and C d) A, B and D