The eastern Mediterranean was once known as the eastern Roman empire before the actual fall of Rome in the 5th century, but it was later known as the Byzantine empire throughout the rest of the middle ages. It was known as the actual successor the the Roman Empire as oppose to the growing Holy Roman Empire in the German lands. The main changes were 1st its name, it renamed itself as the Byzantine empire. 2nd, was the revision of the Roman laws into the so-called Justinian code. 3rd is the rise of the new type of architecture that differ much from the old Roman, it blended the eastern arab and roman architecture, the best example is the Hagia Sophia. Their Capital Constantinople as opposed to Rome was founded in Christian origin rather than the polytheistic Greco-Roman religion. Their problems were also different in a way that Rome was located in the sea so basically it lacks the problem of naval warfare compared to Constantinople which is always under threat of the growing Islamic sphere. The continuity was found in the field of politics, economy, military and culture, much of the Roman influences are still found in this new empire. The writings of the classics like Plato's and other greek philosophers were developed and maintained unlike in the west where much of it was forgotten. Sciences were preserved and cultivated.
After the Soviets successfully detonated an atomic bomb in 1949, President Harry S. Truman ordered the creation of a hydrogen bomb project. With the help of the Polish mathematician Stanislaw Ulam, Dr. Teller developed a model for the hydrogen bomb known as the Teller-Ulam design
I think the answer is c. it looks quite accurate.
The consequences of this violent catastrophe were many. A cessation of wars and a sudden slump in trade immediately followed but were only of short duration. A more lasting and serious consequence was the drastic reduction of the amount of land under cultivation, due to the deaths of so many labourers. This proved to be the ruin of many landowners. The shortage of labour compelled them to substitute wages or money rents in place of labour services in an effort to keep their tenants. There was also a general rise in wages for artisans and peasants. These changes brought a new fluidity to the hitherto rigid stratification of society.