Union troops bombarded Confederate forts, Union forces sustained heavy causalties.
Explanation:
In the middle of the night of April 24, Admiral David Farragut led a fleet of 24 gunboats, 19 mortar boats and 15,000 soldiers in a daring run past the forts. Now, the river was open to New Orleans except for the ragtag Confederate fleet. The mighty Union armada plowed right through, sinking eight ships.
I would say D. because all of the others are basically answering the entirety of the speech. If you would discuss ways to increase the literacy rates in the U.S. you would need to go over it last after you explain why the U.S. is so illiterate.