The question doesn't have enough info to answer
Answer:
Visual aids are items of a visual manner, such as graphs, photographs, video clips etc used in addition to spoken information.
Progressive verbs I believe end in "-ing" because they are actions that are still in the process of being performed. So, the answer is C because of the word "reading"
The German regime’s decision...
German casualties...
The troops...
As a result...
Historians may disagree...
