Which situation demonstrates meeting the goal of efficiency?

I believe the answer is: when you do something with as little waste as possible

Maximum efficiency is achieved if you manged to obtain the maximum benefit while making the least amount of expense as possible. In managing your daily life, this could be achieved by making sure that your time is spent carefully so it give as little waste as possible.

It is in the situation when you are doing something just as something with as little waste as possible.

Explanation:

High range of the efficiency is somehow achieved if you would be managing up as to obtain with the greater advantage at the time of making on with the least amount of expense as possible. In bringing management into your daily life, this could be somehow all achieved by making sure that your time is on the whole spent carefully so it give as little waste as possible.