Step 1: Understand the principle of management.
The principles of management are universal, flexible, and dynamic, as they can be applied across different situations and adapted over time.
Step 2: Evaluate the options.
- Management principles are dynamic because they change with circumstances.
- They are flexible, allowing for adaptation in different environments.
- These principles are universal, applying to any organization.
Step 3: Conclude.
All these characteristics apply to the principles of management.
Final Answer:
\[
\boxed{\text{All of these}}
\]