Answer: The correct answer is "d. philosophy of total quality management.".
Explanation: Platanus Inc. was clearly focused on the quality of its products, as it created an automated process to improve efficiency and minimize human error in its production process so that the company produces zero defect engines, so that they reward their employees when they occur with 0 defects.
So based on the information, the most likely conclusion is that Platanus Inc applied the philosophy of total quality management.