What event are you learning that took place in 1815? Maybe more detail I could help
I would go with
A.an end to a hostile relationship with Russia
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The answer is, Thousands of people left East Germany. Just in case someone doesn't have time to read that long explanation in the previous answer. IM not sure what their answer was but I took the test on Edenuity and this is the correct answer.
Answer:
Claudius: Poisoned by his wife Agrippina in 54.
Galba: Murdered in plot orchestrated by Otho in 69.
Vitellius: Murdered in 69
Explanation: