it has to be d because the occupation zones is the only thing that slowed Germany down
Protectorate - Local leaders following the advice of foreign advisors
Sphere of Influence - Outside power claims exclusive trading and investment privileges.
Direct Rule - Western country sends its own people to the country to rule it.
Indirect Rule - Would take a native ruler and teach/train them to run the country the way the Western nation wants.
Use a variety of sources because one source may be incorrect. However, you can have more proof that the fact is correct when most of the sources all verify the same thing during your research. Hope this helps!
The economic success of the Erie Canal impacted westward expansion because it allowed settlers to travel by boat and could ship goods to the East.