"Two mountain ranges, the Alps and the Apennines, helped to protect Rome from invasion." I researched it and found this on a reputable source. Therefore, it would be B.
Answer:
Option: B) The Alps helped protect the Roman Empire from invasion.
Explanation:
Despite being military strong, geographical condition helped Rome to grow and conquer most of its neighboring states and expanding its empire in Europe. The Alps mountain helped to protect the Romans from invasion. Being located on the northern region, the Alps closed the land from the rest of Europe during winter. The natural condition of Alps in winter protected Rome from outsides by pushing enemies to climb gradually through narrow paths, providing the Romans to react.