City official: In states where parallel parking is a required element

states where parallel parking is a required element of driver licensing exams the percent of accidents resulting from improper parallel parking is nearly 7%.
states without this requirement have a negligible number of parallel parking related incidents.
Therefore, we should remove the parallel parking element of the test, as it is clearly counterproductive to driver safety (conclusion of the argument)

(A) Whether states without a parallel parking element of the exam previously contained such an element, but later removed the element
states without a parallel parking element of the exam previously contained such an element or not doesn't help find
whether parallel parking element is counterproductive and we can't say we should remove such elements or not

(B) Whether related accidents occur primarily during the evening, when poor lighting might have obstructed the driver's vision
whether accidents occur during morning or evening doesn't help evaluate the conclusion that we should remove the parallel parking element or not irrelevant

(C) Whether the driver at fault in parallel parking-related accidents was the individual attempting to parallel park
by knowing individual attempting to park is at fault or not doesn't help evaluate the conclusion that we should remove such elements or not
so OUT

(D) Whether a significant portion of the parking in states where there is not a parallel parking element of the exam is parallel parking
(correct)
yes this answer choice is what we are looking for let's apply the variance test on this answer choice if yes--strengthen the conclusion.....if no--weaken the conclusion
--yes--a significant portion of the parking in states where there is not a parallel parking element of the exam is parallel parking
this says the significant portion is parallel parking also there is no parallel parking element in spite of this there are negligible accidents
but states where there are parallel parking elements 7% accidents occurs this may be because of these elements so these elements are counterproductive
to public health so we should definitely remove parallel parking elements (this strengthen the conclusion)

--no--a significant portion of the parking in states where there is not a parallel parking element of the exam is not parallel parking
if significant portions are not parallel parking then.... negligible accidents are because of less need to park parallel..this doesn't prove that these elements are detrimental
so we cant remove parallel parking elements (this weakens the conclusion)

(E) Whether all parallel parking-related accidents are reported to the authorities
here we are concerned about whether parallel parking element is required.
and answer to this choice-- all parking accidents are reported or not? doesn't help evaluate whether the parallel parking element is required
so OUT