Mastering C++: A Comprehensive Quiz Based on 'Thinking in C++'

The main goal of OOP, or Object Oriented Programming, is to model real-world problems into a more organized and understandable structure. This allows for easier problem solving and lends to more efficient and maintainable code. The other options listed, such as simplifying code syntax or reducing memory usage, may be by-products of utilizing OOP, but they are not the main objective. Similarly, while efficient processing speed is a desirable outcome, it is not the primary goal of OOP. The key concept of OOP is to represent problems through objects and their interactions, making the complex task of programming easier to understand and manage.