Deputy chief executive Julie Townsend said “Baby on Board” signs are very useful in alerting the emergency services that a child may be involved in case of a crash.“This help can become negative if drivers display signs when their child isn’t in the car，” she said.“Worse still is the danger that can be caused by drivers influencing their view by cluttering up (塞满) windows with lots of signs.Drivers’ priority should always be getting there safely without putting themselves，young passengers or other road users at risk.”

　　A survey arranged by price comparison website Confused.com found that 37 percent of parents have displayed signs and four out of five of them believe they improve safety.But 46 percent admit doing so at all times—regardless of whether or not their child is in the car—and 15 percent admit they only have them for their novelty (新奇) value.The poll of 2,000 drivers also found that 46 percent of drivers regard them as a risk and 33 percent say they are lacking in taste.

　　“There are benefits and dangers to ‘Baby on Board’ signs.They can offer useful information for medical aid in case of a crash but having too many novelty items displayed could be a safety issue，” said a Confused.com spokesman.

　　1．What do we learn about the signs on the car from Paragraph 1?

　　A．They can be dangerous.

　　B．They are useful to avoid accidents.

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