Answer:
B, France, and Britain
Step-by-step explanation:
As a lot of weapons came from France and Britain there is a place that made more weapons than that. The German Empire made over 4 million weapons during WW1. As again the German Empire during WW1 was not a single country so that's why it does not count as an option on the question the reason Russia/Soviet Union does not count is that it is not considered a single country and it made fewer weapons than France and Britain. So the countries who made the most weapons for WW1 were France And Britain.