What blocked the US from trading with Germany

Me ! which of the following statements describes how the punic wars contributed to the development of the roman empire? a)they allowed the romans to focus more on expanding into the western mediterranean. b)they resulted in the overthrow of the roman republic and establishment of the empire. c)they marked the end of roman expansion in the mediterranean region. d) they forced the romans to reorganize their government with an emperor as ruler.

Sparta faces threats from without and within the city-state who posed these threats.

Which of the following was probably the most difficult challenge facing construction of the railroad?