_________ pointed out that a major underlying weakness of voting geography has been the failure to relate it to studies in political geography as a whole.

Correct option is C

The correct answer is: (c), Cox
In political geography, Cox's theory is often associated with the "Critical Political Economy" perspective, which is informed by the work of Kevin R. Cox, an influential geographer. This perspective emphasizes the importance of understanding the political-economic processes that shape spatial patterns and relationships in the world.
Cox's theory in political geography focuses on the intersection of politics and economics, particularly how power dynamics and economic forces influence the organization and distribution of resources, territories, and political institutions.
Information booster:
André Siegfried, regarded as the foremost French geographer of his era, authored authoritative studies on various nations worldwide, such as New Zealand, Britain, France, the United States, and Canada. He played a pioneering role in the development of electoral geography, which explores the interplay between geography and politics.
In the realm of agricultural geography, Weaver (1954) was the initial scholar to employ statistical methods for delineating crop combination zones within the Midwestern United States.
When delineating agricultural regions in the Midwestern United States, Weaver utilized acreage statistics as the foundation of his analysis.
In his work, Weaver calculated deviation of the real percentages of crops (occupying one percent of the cropped area) for all the possible combinations in the component areal units against a theoretical curve for the standard measurement was employed as follows: