Critical Reasoning

Instead of blaming an automible accident on driver error, insurance companies should first try to figure out why the error was made by analysing flaws in road design, automobile designs and in criteria to determine eligibility for a driver's lincense. Only then will the insurance companies be able to effectively issue guidelines to prevent future accidents, instead of merely punishing the incidental driver.

Which of the following is a presupposition of the argument above?

1) Driver error is not a significant factor in most automobile accidents.
2) Automobile manufacturers should be the agents who investigate automobile accidents and not insurance companies
3) Stricter government regulation of automobile and highway construction industries would make auotmobile travel safer.
4) Investigation of automobile accidents should contribute to the prevention of future accidents
5) Most drivers who make errors in driving repeat those errors ulnless they are restrained.

Please provide line of thought alsong with selected answer choice.

Source: ManRev

I think A is the answ

the author of the text thinks, that there are other more major factors ,such as "auto design", "flaws of the roads" etc,than driver errors

A
as the author mentions about other conditions than the drivers fault which is making assumption.

I think D should be the answer. The argument says that after a study of other contributing factors towards accidents, insurance companies will come up with better guidelines for safer travel and hence prevent future accidents. So the argument is presuming the investigation of current accidents will help prevent future accidents. If this is not true, then there is no point in doing a study and the argument falls apart.

Hence D

D is the right answer.