In the country of Laurelia, legal restrictions on the sale of lock-picking equipment were relaxed ten years ago, and since then Laurelia’s burglary rate has risen dramatically. Hence, since legally purchased lock-picking equipment was used in most burglaries, reintroducing strict limits on the sale of this equipment would help to reduce Laurelia’s burglary rate.
Which of the following, if true, gives the pest support to the argument

A．Laurelia’s overall crime rate has risen dramatically over the last ten years.

B．There is wide popular support in Laurelia for the reintroduction of strict limits on the sale of lock-picking equipment.

C．The reintroduction of strict limits on the sale of lockpicking equipment in Laurelia would not prevent legitimate use of this equipment by police and other public safety officials.

D．Most lock-picking equipment used in Laurelia is fragile and usually breaks irreparably within a few years of purchase.

E．(E) The introduction five years ago of harsher punishments for people convicted of burglary had little effect on Laurelia’s burglary rate.

A．该交变电流的频率为10Hz

B．

C．外接电阻R所消耗的电功率为10W

D．