请阅读短文，完成此题。 More and more gadgets seek to replicate the sorts of things your mother used to needle youabout: getting exercise, eating more slowly or brushing your teeth. Now one company has decided toembrace that image--it has named its product "Mother". The device, from a firm called Sense, caught my eye at a press preview for the 2014 ConsumerElectronics Show in Las Vegas, in part because of its unique design. It looks like a cross betweenWALL-E's girlfriend EVE and Russian nesting dolls. Mother has slightly creepy glowing eyes--butsurely has your best interest at heart? Mother's potential use is intriguing: Each Mother unit talkswirelessly to a set of smaller tracking devices, dubbed cookies, which can sense motion andtemperature. You can put cookies on things and people--on your body to gather data about how muchyou walk, on your coffee machine to track many espressos you drink, on your front door to trackwhenever it is opened, on your toothbrush to see how often and how long you brush ... and so forth. Whenever the cookies get close to the Mother unit, they wirelessly send back their data to theInternet. The company says users of Mother, which is supposed to start shipping in the spring, will beable look at all their information at once, or drill down on certain topics. And if something is reallyimportant, you can have an alert sent to your phone when a sensor detects a change. So what does all that data do for you? That's a question that bedevils many Internet of Thingsgadgets on display here at CES. Mother's makers say the data she tracks can help you gain peaceof mind by answering specific questions in your life, such as,"Am I drinking enough water?" or,"Did somebody open my secret drawer?" Lots of companies want to connect parts of your body, home and life to the Internet--a trendcalled the "Internet of Things". Mother's maker, Rafi Haladjian, told me he thinks having separatedevices for all these things is too expensive and too cumbersome because they can't talk to eachother."There are not so many needs that are worth $200" for a distinct Internet-connected device,he said. Mother, which costs $222 for a base unit and four cookies, is designed to be repurposed asnew challenges or needs spring to mind, he said. It's kind of like a mobile device that can run anever-changing array of apps. Where did the name come from? "We need a device that does all sort of things," Haladjiansaid. "The metaphor that matched this noble caring figure is the mother. She is not a nurse, agardener or a cop--she is everything at the same time." What are the disadvantages of "Things of Internet" according to Raft Haladjian? 查看材料
A．Different things can't communicate with each other. B．They are too expensive and without utility. C．The safety of them can't be ensured. D．They may threaten people's privacy.