The correct answer among all the other choices is Interstate Highway System. This Cold War protection is still in use today. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help.
Answer
Provideed a moral reason to fight the war
Explanation:
Abraham Lincoln states explicitly, "all persons held as slaves within any State or designated part of a State, the people whereof shall then be in rebellion against the United States, shall be then, thenceforward, and forever free". He only freed the slaves in the confederate states of America, and formally tied the issue of slavery directly with the war.