The drug abuse and the addiction to

by **tankobe** Wed Jan 13, 2010 3:37 am

(1)The drug abuse and the addiction to such drugs among callan lead to 55 percent more adolescent criminals in USA and prompts fears among some pliticals that social safety is being compromised.
(A)lead to 55 percent more adolescent criminals in USA
(B)lead to 55 percent as many adolescent criminals in USA
(C)lead to a 55-percent increase in adolescent criminals in USA
(D)lead to an increase of 55 percent in adolescent criminals in USA

(2)In the previous decade there were 1000 adolescent criminals cases at G Town, But in recent decade the drug abuse and the addiction to such drugs have lead to 55 percent more adolescent criminals and prompts fears among some local pliticals that social safety is being compromised.
(A)lead to 55 percent more adolescent criminals
(B)lead to 550 more adolescent criminals
(C)lead to 55 percent as many adolescent criminals
(D)lead to a 55-percent increase in adolescent criminals
(E)lead to an increase of 55 percent in adolescent criminals

both question revised from a OG question[* so context and choices are different; if you want a real one, see OG10 #185]. the changing of context and choice refflect my confusion in the knowledge tested by GMAT.
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For (1), The OG said the counterpart key of A is ambigious, but i don't know why so[in common sense, the usage seems OK---eg. give me one more reply!] there may be some reason, since the official answer are always right:
1# 55% of what? the context does not say, so we still don't know how many. so that why A and B in (1) may be WRONG.

2# if the reason above is the issue, then B in (2) may be OK, since it said 550 more adolescent criminals.

however, there may be another reason, because B in (2) say lead to 550 more (than there are 1000 criminals); it seems that the abuse has lead to 1550 criminals. if so, then CDE in (2) can be right.

Ron or other instructors, could review each choice (each group is also OK--eg. CDE group) in (1) and (2), and my thoughts? why is it wrong or not?