Step 1: Understanding planning.
Planning is one of the key functions of management. It involves setting objectives and deciding in advance the appropriate actions to achieve them. A good plan must adapt to changing circumstances.
Step 2: Analysis of options.
- (A) Rigid: Incorrect, rigidity prevents adjustment in dynamic situations.
- (B) Expensive: Costly planning does not guarantee success.
- (C) Flexible: Correct, because flexibility ensures that plans can adapt to unforeseen changes and challenges.
- (D) Time consuming: While planning may take time, this is not the essence of a good plan.
Step 3: Conclusion.
The correct answer is (C) Flexible, as a good plan must adjust to changing circumstances.