Step 1: Identify the principle.
The "one best way" refers to the idea that there is a most efficient method for performing any task, which is a core concept of Taylor's scientific management.
Step 2: Evaluate the options.
- The principle of finding the most efficient method corresponds with the "Absolute" principle, as it implies there is one optimal solution to any task.
Step 3: Conclude.
The correct answer is the "Absolute" principle, where one best way to perform tasks is defined.
Final Answer:
\[
\boxed{\text{Absolute}}
\]