Which detail best supports the writer’s idea that “statesmanship is not an abstract skill, but a contextual one”?

A: The strategy he preferred would have contained the spread of slavery, then gradually eliminated it

B: it [Lincoln’s strategy] failed in the end, since the South concluded that it could not trust President Lincoln, who received not a single electoral vote from the South, to protect its “peculiar institution

C: n the maelstrom of war, Lincoln overcame his disinclinations2 to see that the Union could only be preserved if it sought to achieve something greater than its own survival.

D: Lincoln was above all a war president

E: And he might well have found out, as Winston Churchill or George H. W. Bush later did, that voters prefer very different kinds of leaders in times of peace and war.