I believe it would be letter D (maybe letter C if not D)
Answer: Russia is a Tzarism Country.
Explanation:
Tzarism is a system of government by a tsar, especially in Russia until 1917.
I think this might help you figure out the theme, hope this helps
Answer:

Explanation:
Nancy only believes that her brother is in Paris. Even if he is in Paris or he is not, Nancy cannot know for sure.