The cholera epidemic. The others were factors, but not as serious.
This act authorized the building of highways throughout the nation, which would be the biggest public works project in the nation's history. Popularly known as the National Interstate and Defense Highways Act of 1956, the Federal-Aid Highway Act of 1956 established an interstate highway system in the United States.
Carbon dating is one method I think
Answer:
d. France
Explanation:
Russia had Stalin, Italy had Mussolini, and Germany had Hitler,
The Roanoke colony also known as lost colony