Question 2.

The reasons mentioned in options B, C and D are clearly stated in the passage.

The line, 'Another reason for reflex rejection of geographic explanations is that historians have a tradition, in their discipline, of stressing the role of contingency (a favorite word among historians) based on individual decisions and chance' relates to option B.

Option C relates to the line, 'One reason is that some geographic explanations advanced a century ago were racist...'

Option D relates to the last two lines of the passage.

Option A, on the other hand, does not provide a reason for the disregard of geographic influences by non-geographers. So, this is the correct answer choice.

The question is " All of the following are advanced by the author as reasons why non-geographers disregard geographic influences on human phenomena EXCEPT their: "

Hence, the answer is 'dismissal of explanations that involve geographical causes for human behaviour.'

Choice A is the correct answer.