Bantu or some of the people that traded to them such as Swahii,Omani, ect who may have spread the new language they learned from speaking to them to trade.
The correct answer is B) German-American schools, churches, and magazines largely abandoned the use of the German language.
One effect that World War I had on German Americans was that German-American schools, churches, and magazines largely abandoned the use of the German language.
Without a doubt, the German community in the United States suffered from anti-German sentiments during and after World War 1. US citizens started to demand the ban of the German language in the country. This meant no more German-speaking in schools or churches. Many German sites such as theaters were closed. And people also demanded to stop any kind of publication in German, magazine or newspaper.
The US became involved in WWII due to the Pearl Harbor attack by the Japanese.
What people believed they followed so that effected their decisions and depending what they did that was the mark they left on the world.