Answer:
The answers are:
He talked down to Christoffels.
He ridiculed and called Christoffels names.
Step-by-step explanation:
The question above is related to the story of "The Hiding Place" written by Corrie Ten Boom. This story actually serves as a biography on Boom's life during the wars which occurred in Holland.
One of the characters in the story was "Otto." He was a young German who was also a Nazi. He was working as an apprentice to Boom's father. At one point in the story, Otto started abusing Christoffel, an old man who also works at the watch shop. Christoffel was always subjected to Otto's violence such as being talked down or being ridiculed by him. Sometimes, Otto would trip and hit Christoffel. These were the ways Otto persecuted Christoffels.
Thus, this explains the answer.