Read this excerpt from Winston Churchill's "Their Finest Hour" speech:

Some people will ask why, then, was it that the British Navy was not able to prevent the movement of a large army from Germany into Norway across the Skagerrak?
. . . [B]ecause of the distance, we could give no air support to our surface ships, and . . . were compelled to use only our submarines. . . . Our submarines took a heavy toll but could not, by themselves, prevent the invasion of Norway. In the Channel and in the North Sea, on the other hand, our superior naval surface forces, aided by our submarines, will operate with close and effective air assistance.
Which statement best explains one way that the structure of this excerpt is effective?


A. It reminds the English people that their navy has taken a heavy toll on German ships.

B. It uses a rhetorical question to account for the English navy's strategy in Norway.

C. It accounts for the English navy's failure to protect Norway and reassures the nation that it can defend England.

D. It reminds the English people that they have an effective submarine force to defend Britain.