The Manifest Destiny which stated that the U.S. had a God-given right to all of the land in North America
The union army had blocked all Texas ports. Goods being brought in or out were unable to be delivered. Also, the men had all gone to war. Therefore the factories, farms, and businesses left unattended. Crops could not be harvested, and sold. Thus, the Civil <span>War deeply affected Texas income.</span>
<span>Twenty years ago, on April 19, 1995, Timothy McVeigh detonated a massive truck bomb in front of the Murrah Federal Building in Oklahoma City. The immediateimpact of the bombing was obvious. The attack not only caused death and destruction but created a storm of media coverage covering this “attack on the heartland.”</span>
It would be D because during the civil war Maryland was a border state between the confederacy and Union. Maryland was also a slave holder state which meant it could secede easily. It would also make it vulnerable to the union if it seceded but both ways too.
The First World War should be your answer
~ 20 million people died in WW1
hope this helps