Answer:
Pretty sure its B :) will you mark brainliest to help me out?
Explanation:
Germanys resumption of submarine attacks and merchant ships in 1917
First came the Zollverein (Toll Union) in 1833 that, by abolishing tolls between the various German principalities, made Germany into a common market. For a period of decades, until about 1860's, there were attempts at imitating in Germany the industrialization that had taken place elsewhere in Europe.
Answer:
C. European involvement helped expand the slave trade within Africa.
Explanation: