题目内容：
根据下面资料，回答题 With so much focus on children's use of screens, it's easy for parents to forget about their ownscreen use. "Tech is designed to really suck you in, " says Jenny Radesky in her study of digital play,"and digital products are there to promote maximal engagement. It makes it hard to disengage, andleads to a lot of bleed-over into the family routine. "
Radesky has studied the use of mobile phones and tablets at mealtimes by giving mother-childpairs a food-testing exercise. She found that mothers who used devices during the exercise started 20percent fewer verbal and 39 percent fewer nonverbal interactions with their children. During a separate observation, she saw that phones became a source of tension in the family. Parents would belooking at their emails while the children would be making excited bids for their attention.
Infants are wired to look at parents' faces to try to understand their world, and if those faces areblank and unresponsive--as they often are when absorbed in a device--it can be extremely disconcerting for the children. Radesky cites the "still face experiment" devised by developmental psychologist
Ed Tronick in the 1970s. In it, a mother is asked to interact with her child in a normal way beforeputting on a blank expression and not giving them any visual social feedback; The child becomes increasingly distressed as she tries to capture her mother's attention. "Parents don't have to be exquisite-
ly present at all times, but there needs to be a balance and parents need to be responsive and sensitive to a child's verbal or nonverbal expressions of an emotional need, " says Radesky.
On the other hand, Tronick himself is concerned that the worries about kids' use of screens areborn out of an "oppressive ideology that demands that parents should always be interacting" with theirchildren: "It's based on a somewhat fantasized, very white, very upper-middle-class ideology thatsays if you're failing to expose your child to 30,000 words you are neglecting them. " Tronick believes that just because a child isn't learning from the screen doesn't mean there's no value to it--particularly if it gives parents time to have a shower, do housework or simply have a break from theirchild. Parents, he says, can get a lot out of using their devices to speak to a friend or get some workout of the way. This can make them feel happier, which let them be more available to their child therest of the time.
According to Jenny Radesky, digital products are designed to_______. A．simplify routine matters
A．simplify routine matters
B．absorb user attention
B．absorb user attention
C．better interpersonal relations
C．better interpersonal relations
D．increase work efficiency
D．increase work efficiency
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