Rome had better citizenship
I would say that the social support systems of developed countries are far more advanced than those in developing countries. Developed countries invest about 40% of total money into these programs that ensure the safety of their citizens. On the other hand, developing countries invest less that 10% which means that the system is poorer and doesn't provide much for citizens.
The answer I believe is B !
Well without a description om shooting in the dark. But id assume that the answer is Trench Warfare. Since A- was around since contact with Native Americans and largely popular in North America. B- Only was used and discovered in WW2. And C- was used but was largely frowned upon and condemned by both sides.<span />
A contentious issue at the 1787 Constitutional Convention was whether slaves would be counted as part of the population which they were deciding if they be under the representation of the states in the Congress or would instead be considered property and, as such, not be considered for purposes of representation.