The effect of Uncle Tom's Cabin on the nation was to

A. help humanize southern slaveholders in the minds of northern readers.
B. reveal the ugly extent of the vicious slave trade to America.
C. offer the first written history of American slavery.
D. spread the message of abolitionism to an enormous new audience.
E. ignite such anger in the South that several states soon seceded from the Union.

1920's

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explanation:

union blockade

explanation:

the union blockade in the american civil war was a naval strategy by the united states to prevent the confederacy from trading.

the blockade was proclaimed by president abraham lincoln in april 1861, and required the monitoring of 3,500 miles (5,600 km) of atlantic and gulf coastline, including 12 major ports, notably new orleans and mobile. those blockade runners fast enough to evade the union navy could only carry a small fraction of the supplies needed. they were operated largely by british citizens, making use of neutral ports such as havana, nassau and bermuda. the union commissioned around 500 ships, which destroyed or captured about 1,500 blockade runners over the course of the war.

in 1862, president lincoln's emancipation proclamation opened the door for african americans to enlist in the union army. although many had wanted to join the war effort earlier, they were prohibited from enlisting by a federal law dating back to 1792.

explanation: