Radio stations with radio data system (RDS) technology broadcast special program information that only radios with an RDS feature can receive.Between 1994 and 1996, the number of RDS radio stations in Verdland increased from 250 to 600.However, since the number of RDS-equipped radios in Verdland was about the same in 1996 as in 1994, the number of Verdlanders receiving the special program information probably did not increase significantly.
Which of the following is an assumption on which the argument depends?
(A)(Few if any of the RDS radio stations that began broadcasting in Verdland after 1994) broadcast to people with RDS-equipped radios (living in areas not previously reached by RDS stations).在那些1994年后开始在V城广播的备有RDS系统广播站中，几乎没有一个（广播站）对那些拥有有RDS功能收音机并且住在以前备有RDS系统的广播站播不到的地方的人进行广播。
如果把此项取非的话即有备有RDS系统的广播站对（划线部分）进行广播，则原文的结论the number of V-ers receiving the special program information did not increase不成立，weaken了原文结论。因为（划线部分）原来收不到的广播现在因为1994年后新建的广播站对他们也进行播出了，所以他们就收得到广播了，即人数也增加了。取非后weaken了原argument，即是assumption！
(B) In 1996 most Verdlanders who lived within the listening area of an RDS station already had a radio equipped to receive RDS.
(C) Equipping a radio station with RDS technology does not decrease the station's listening area.
(D) In 1996 Verdlanders who did not own radios equipped to receive RDS could not receive any programming from the RDS radio stations that began broadcasting in Verdland after 1994.
