At a shopping center, a father emerged from a store dragging his naughty young son by the scruff (颈背) of the neck, as if he were the family cat. The man had no idea his parenting skills were becoming eternal.At an office supply store, a mother decided to get an item from a high shelf by balancing her small child on her shoulders, unaware that she, too, was being recorded.These scenes may seem like casual shopping behavior, but they are meaningful to stores that are trying to engineer a better experience for the consumer, and ultimately, higher sales for themselves. Such clips, sellers say, can help them find solutions to problems in their stores — by installing seating and activity areas to comfort children, for instance, or by lowering shelves so the goods is within easy reach.Privacy (隐私) advocates, though, are troubled by the arrangement of video cameras, motion detectors (检测器) and other gear monitoring the nation's shopping corridors.What does the first paragraph mean?A. The boy was like a cat who scratched his father.B. The father thought his teaching skills were very useful.C. The boy was naughty so that his father was very angry.D. The behavior of the father was videotaped by the store.

At a shopping center, a father emerged from a store dragging his naughty young son by the scruff (颈背) of the neck, as if he were the family cat. The man had no idea his parenting skills were becoming eternal. At an office supply store, a mother decided to get an item from a high shelf by balancing her small child on her shoulders, unaware that she, too, was being recorded. These scenes may seem like casual shopping behavior, but they are meaningful to stores that are trying to engineer a better experience for the consumer, and ultimately, higher sales for themselves. Such clips, sellers say, can help them find solutions to problems in their stores — by installing seating and activity areas to comfort children, for instance, or by lowering shelves so the goods is within easy reach. Privacy (隐私) advocates, though, are troubled by the arrangement of video cameras, motion detectors (检测器) and other gear monitoring the nation's shopping corridors. What does the first paragraph mean? A. The boy was like a cat who scratched his father. B. The father thought his teaching skills were very useful. C. The boy was naughty so that his father was very angry. D. The behavior of the father was videotaped by the store.