Although Portugal was the first to use African slaves, Spain first sent them to America
I think that it is answer C
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.
I'd go with C. <span>It extended over three major continents. </span>
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