单选题：This Way to DreamlandDaydreaming means people think about s

This Way to Dreamland
Daydreaming means people think about something pleasant, especially when this makes them forget what they should be doing. Daydreamers have a bad reputation for being unaware of what’s happening around them. They can seem forgetful and clumsy._71__They annoy us because they seem to be ignoring us and missing the important things.
But daydreamers are also responsible for some of the greatest ideas and achievements in human history. __72__ Can you imagine what kind of world we would have without such ideas and inventions?
So how can you come up with brilliant daydreams and avoid falling over tree roots or otherwise looking like a fool?
First, understand that some opportunities(机会) for daydreaming are better than others. Feeling safe and relaxed will help you to slip into daydreams.__73_ And if you want to improve your chances of having a creative idea while you’re daydreaming, try to do it while you are involved in another task—preferably something simple, like taking a shower or walking, or even making meaningless drawings.
It’s also important to know how to avoid daydreams for those times when you really need to concerntrate. “Mindfulness”, being focused, is a tool that some people use to avoid falling asleep.__74__
Finally, you never know what wonderful idea might strike while your mind has moved slowly away.____75_
Always remember that your best ideas might come when your head is actually in the clouds. A．Having interesting things to think about also helps.
B．They stare off into space and wander by themselves.
C．Without wandering minds, we wouldn’t have relatively, Coke or Post-it notes.
D．At one time, daydreaming was thought to be a cause of some mental illnesses.
E．It involves slow, steady breathing for self-control that helps people stay calm and attentive.
F．Daydreams are often very simple and direct, quite unlike sleep dreams, which may be hard to understand.
G．Therefore, it’s a good idea to keep a notebook or voice recorder nearby when you’re in the daydream zone.
根据材料，请在71处填上最佳答案。