Which of the following best identifies a central idea of this text?

What are the two powers that the federal and state governments share?

By choosing to resupply fort sumter, abraham lincoln risked a. abandonment of the fort by union soldiers. b. abandonment of the fort by confederate soldiers. c. the appearance of giving in to confederate secession. d. armed conflict with southern soldiers.

What are some of the difficulties that the japanese face due to the islands' geography?