Read this passage from a fictional 20th-century Russian newsletter:The Russian czarist system must end immediately. It is the only thing responsible for the starvation and death Russians face today. Without the czar, Russia would be the wealthiest, most powerful country in the world. If we overthrow him, the Russian people will have the highest standard of living humanity has ever witnessed within six months! Why would historians most likely question this source's credibility?

A. It references disturbing concepts like starvation and death.
B. It does not discuss any countries other than Russia.
C. It calls for the overthrow of an established government.
D. It makes claims that seem dishonest and unrealistic.