Final answer:
To manage multitask performances effectively, one must decrease multitasking, aligning with scientific management's goal to increase workers' efficiency.
Step-by-step explanation:
To limit and manage multitask performances, the correct option is to b. Decrease multitasking. By reducing the number of tasks you're attempting to handle at once, you can focus more effectively on each task, thereby increasing your overall productivity and efficiency. This approach is related to the principles of scientific management, whose goal was a. to increase workers' efficiency. This management theory, developed by Frederick W. Taylor, aims to improve economic efficiency and labor productivity through systematic study and analysis of workflows.