Final answer:
The goal of carefully designing jobs with efficient work methods is to achieve scientific management.
Step-by-step explanation:
The correct answer is a) Scientific. Carefully designing jobs with efficient work methods is necessary to scientific management. Scientific management, also known as Taylorism, refers to the approach of improving work efficiency through scientific methods and techniques. It involves analyzing tasks, determining the most efficient work methods, and standardizing those methods to increase productivity and profitability.