B is correct, but i`m not sure why, only chose by my instinct

hummel

5. A recent report determined that although only three percent of drivers
on Maryland highways equipped their vehicles with radar detectors,
thirty-three percent of all vehicles ticketed for exceeding the speed
limit were equipped with them. Clearly, drivers who equip their vehicles
with radar detectors are more likely to exceed the speed limit regularly
than are drivers who do not.
The conclusion drawn above depends on which of the following assumptions?
(A) Drivers who equip their vehicles with radar detectors are less likely
to be ticketed for exceeding the speed limit than are drivers who do not.
(B) Drivers who are ticketed for exceeding the speed limit are more likely
to exceed the speed limit regularly than are drivers who are not ticketed.
(C) The number of vehicles that were ticketed for exceeding the speed
limit was greater than the number of vehicles that were equipped with
radar detectors.
(D) Many of the vehicles that were ticketed for exceeding the speed limit
were ticketed more than once in the time period covered by the report.
(E) Drivers on Maryland highways exceeded the speed limit more often than
did drivers on other state highways not covered in the report.

mbz

the outline of the  statement: most ticketed have equiped radar

the conclusion: most equiped are more likely to exceed speed limit

the assumption: most ticketed are more likely to exceed speed limit. (so, it fills the gap)

食色性也，老子说的...

但凡事要适可而止,中庸也是孔子思想