How were the majority of the current national borders in Africa determined? A. by European partitioning of the region

B. by traditional African national borders

C. by historic property rights of African tribes

D. by natural features such as rivers and deserts

The telegraph, the transatlantic telegraph cable, and the telephone were important to businesses after 1850 because of a. they created a system for developing new inventions. b. they filled a need that other inventions of the day could not. c. they attracted investors and created the stock market. d. they made picture-taking a popular american pastime.