Final answer:
The three levels of ERP implementation are pre-implementation, implementation, and post-implementation.
Step-by-step explanation:
The correct answer is B) Pre-implementation, Implementation, Post-implementation.
ERP (Enterprise Resource Planning) implementation typically involves three key phases: pre-implementation, implementation, and post-implementation. During the pre-implementation phase, goals and objectives are defined, requirements are gathered, and a plan is developed. The implementation phase involves configuring and customizing the ERP system, data migration, and testing. Finally, the post-implementation phase focuses on user training, system maintenance, and continuous improvement.