I would say the answer is C. hope I helped :]
Answer:
all of the above
Explanation:
Scientific management, also known as Taylorism, is a management theory formulated by Frederick Winslow Taylor in the 1880s and 1890s and published in 1911, which analyses and synthesizes workflows. This theory in workplace was centered on the improvement of efficiency and throughputs of manufacturing process systems with the reduction of time and efforts individual steps take.
The correct answer to this question is letter "d. motivation." According to the text, motivation is the set of forces that initiates, directs, and makes people persist in their efforts to accomplish a goal. If you have the motivation, then it is very smooth to achieve your goal.