Final answer:
Abraham Lincoln suspended habeas corpus during the Civil War to allow for the arrest and detention of Confederate sympathizers, exercising extraordinary presidential powers without wholly compromising civil liberties.
Step-by-step explanation:
Among the statements about Lincoln's practices as a wartime president, the accurate statement is that he suspended habeas corpus, allowing for the arrest and detention of Confederate sympathizers. This action was part of his use of presidential war powers to further undermine the Confederate effort to seek independence. Lincoln's suspension of habeas corpus was initially selective, particularly in Maryland, and then more broadly through the Habeas Corpus Suspension Act. Despite suspending habeas corpus, Lincoln did not compromise all civil liberties, as freedom of speech and the press continued to exist, albeit with some limitations.