What does the image illustrate in terms of how strategies of the Union and Confederacy differed?

A.
The image shows that General Lee took a more offensive tactic by surrounding sea ports.

B.
The image shows that General Grant took a more offensive attack-and-strike strategy.

C.
The image shows the pressure General Grant put on the Union.

D.
The image shows that General Lee sought to control areas around the Mississippi.

D. The image shows that General Lee sought to control areas around the Mississippi.