Why had Africa remained isolated and untouched by European powers for so long?

Which revision stands out as most effective for a multimedia presentation slide? sources were left out. the language is simplified. a lot of the information is left out. sentences were used instead of phrases.

According to us supporters, which was a benefit of purchasing alaska? the territory would be a buffer to invasions from europe. the territory would provide a place for many americans to live. it would increase trade by improving access to the northern pacific. it would increase the united states’ power by creating a bond with russia.

What role did priests and bishops play in the early christian church