Read the article and select the best answer. Article: In my thirty years as a time management speaker, I have observed a lot of what we can not and should not do to increase our daily results. Time management is not necessarily working harder, but rather smarter. A lot of our time management has to do more with what we are not doing rather than what we are doing. Sometimes our mistakes will keep us from running at a full pace. Here are some time management mistakes we should all avoid to help us increase our daily efficiency: Start your day without a plan of action. Without a plan, you will have worked hard but may not have done enough right things. Time management is not doing the wrong things more rapidly. That just gets us nowhere faster. Time management is doing the right things. Work with a messy desk or work area. Studies have shown that the person who works with a messy desk spends, on average, one and a half hours per day in looking for things. That's seven and a half hours per week. If you have ever visited the office of a top manager, you can easily find that he or she is working with a clean desk environment. Don't take a lunch break. Many people do not take a lunch break. They work through that time period in the hope that it will give them more time to finish the task. Studies have shown that it may work just the opposite. After doing what we do for several hours, our mind will become boring. A lunch break, even a fifteen-minute break, gives us a chance to get our batteries all charged up again. Question: The text mainly tells us _ . Options: A: how to avoid wasting time B: we should get our batteries all charged up C: how important time management is D: some time management mistakes
A:
D