Insurance = not based on distance driven
Therefore, those who drive less partially subsize the cost of those who drive more
Use the Assumption Negation for (B) the ave. cost of insurance for those who drive less is equal average cost of those who drive more.
The argument will fall apart if this assumption is false. If the cost are just the same, then "partial subsidy" is not going to happen.
（A） the average accident insurance rate for all drivers rises whenever a substantial number of new drivers buy insurance substantial new drivers causing increase in insurance rate is not anywhere in the argument; no tie to the conclusion
（C） the lower the age of a driver， the higher the insurance rate paid by that driver age is not relevant to the conclusion
（D） Insurance company profits would rise substantially if drivers were classified in terms of the actual number of miles they drive each year future prediction is not claimed anywhere in the argument
（E） Drivers who have caused insurance companies to pay costly claims generally pay insurance rates that are equal to or lower than those paid by other drivers we need an assumption for those who drive less and drive more
Impossible is nothing to God.