Ethiopia is not colonized
Answer:
The Nazis took 6 million prisoners of war.
Explanation:
During WWII the Nazis took 6 million Russian prisoners of war between the years 1941 and 1945.
The correct answer is D, because "their" signifie that they are having "their" conversation, and that they own the conversation. C is incorrect because "there" describes where, B is incorrect because "they" describe who, and A is incorrect because "they are" doesn't grammatically or sensibly fit in, so the answer is D.