What is Object$-$Oriented Programming $($OOP$)$ and its main advantage? A$.$ OOP is a paradigm that uses "objects" to model real$-$world entities, prom reuse, making software more modular and maintainable. B$.$ OOP is a procedural programming style that simplifies coding into a step$-$easier for small$-$scale programs. C$.$ OOP is a linear, classless programming approach that prioritizes a straigh suitable for simple tasks. D$.$ OOP is about using standalone functions and global variables, aiming for maintainability and scalability.