Step 1: Understanding the Concept:
Subjective bias occurs when an evaluation is influenced by one person's personal feelings or prejudices. Reducing this requires a more comprehensive data set from multiple perspectives.
Step 2: Detailed Explanation:
Option (c) describes the **360-Degree Performance Appraisal** method.
By gathering feedback from everyone the employee works with—including themselves, their boss, their colleagues, and their juniors—the company gets a rounded view.
If one supervisor has a personal bias against a worker, it will be balanced out by the positive feedback from peers and subordinates, leading to a fairer result.
Step 3: Final Answer:
The correct option is (c).