The correct answer should be A. By strengthening the powers of the US national government
The idea was having a strong centralized government that was based around US ideals and values.
D. is the correct answer. During the civil war medics where considered nuetral and were not shot. Sometimes medics would even help enemies lying on the battle field.
Hope this helps!
B .The Vietnamese adopted the civil service exam.
<span>The Byzantine Empire made its most important contribution to us by preserving much of the Greco-Roman heritage. Given the fact that the Emperors of Byzantine saw and maintained a great deal of their origins from the later Roman Empire, they managed to preserve major institutions such as the Senate, rules of law, etc.</span>