What argument is Franklin D. Roosevelt making in this excerpt from his "Four Freedoms" speech? I have recently pointed out how quickly the tempo of modern warfare could bring into our very midst the physical attack which we must eventually expect if the dictator nations win this war.
There is much loose talk of our immunity from immediate and direct invasion from across the seas. Obviously, as long as the British Navy retains its power, no such danger exists. Even if there were no British Navy, it is not probable that any enemy would be st*pid enough to attack us by landing troops in the United States from across thousands of miles of ocean, until it had acquired strategic bases from which to operate.
But we learn much from the lessons of the past years in Europe-particularly the lesson of Norway, whose essential seaports were captured by treachery and surprise built up over a series of years.

A. Roosevelt is warning isolationists that America cannot depend on any other nation for protection.
B. Roosevelt is warning isolationists that American democracy will collapse if Germany wins the war.
C. Roosevelt is suggesting that the United States will have to ally itself with Britain and the allies to protect human rights around the world.
D. Roosevelt is warning Americans that they will have to cooperate with the government during the war.
E. Roosevelt is suggesting that America must enter the war to prevent the collapse of democracies in Europe.