You are designing a system for processing online orders. The OrderProcessor class handles order logic, including order validation, payment processing, and generating order reports. The code has become difficult to maintain. Which SOLID principle is most likely violated in this situation, and how can it be resolved?

Open$-$Closed Principle $($OCP$)$; by allowing extensions to handle new responsibilities.

Single Responsibility Principle $($SRP$)$; by splitting responsibilities into separate classes like OrderValidator, PaymentProcessor, and OrderReporter.

Dependency Inversion Principle $($DIP$)$; by depending on abstractions for each responsibility.

Liskov Substitution Principle $($LSP$)$; by ensuring that derived classes can replace the base class without changing the system$$s behavior.