Answer:I believe it's the second choice
Britain could rule its large territory with direct, immediate communication.
Explanation:
It's D to divide the confederacy, it wa part of the anaconda plan. Step 1, blockade ports to prevent outside help. Step 2, split the south in half at the mississippi river (the battle of vicksburg was to capture a major control point of the mississippi completing step 2). Step 3, march on the capital city.