Answer:
Correct answer is D. were enslaved states
.
Explanation:
A is not correct because all of them were states since the beginning of war, including West Virginia that became state when Virginia seceded from the Union.
B is not correct as this were the border states that stayed within the Union.
C is not correct as they were actually the factor that was decisive for the outcome of the war.
D is correct as although they were part of Union, they didn't not prohibited slavery, and Lincoln was cautious with that question regarding their role.
I think c may be the closest answer
He applied his skill in engineering to toughen up the defence
Answer:
a mixed economy is an economic system combining private and public enterprise
Explanation:
An example of a mixed economy would be The U.S. and France.