In the highlighted portion of the passage, the author notes that plants were "specialized" primarily in order to A. support a claim about the way in which wartime imperatives determined the amount of government investment in southern manufacturing B. suggest that the federal government's investments in southern manufacturing during the Second world war were largely ineffective C. identify a factor that limited the impact of wartime government investment on the postwar southern economy D. contrast the kinds of manufacturing facilities built in southern states during the Second world war with those built in northern states E. challenge a claim about the reasons for government investment in southern manufacturing during the Second world war