One of the main reason john d. rockefeller was able to succeed in the oil industry was because he?

How did inovations in manufacturing lead to improvments in transportation?

What was the main argument of plessy in plessy v. ferguson

Historians have recently discovered a historical journal published in the early twentieth century. the journal contains facts based on original sources about the downfall of the early byzantium empire. historians consider this long-lost journal to be a breakthrough in their understanding of the byzantium empire. based on this information, the journal is a source.