15. The Eastern European state that gained its independence from the Ottoman Empire in 1830 was: (Points: 5)

Serbia.
Greece.
Bosnia.
Romania.

I'll be glad to check your answer.

To find the answer to this question, we can start by understanding the context. The question asks about an Eastern European state that gained independence from the Ottoman Empire in 1830.

Now, let's analyze each option:

1. Serbia: Serbia did gain independence from the Ottoman Empire, but not in 1830. It gained independence in 1878.

2. Greece: Greece did gain independence from the Ottoman Empire in the early 19th century. The Greek War of Independence started in 1821 and ended in 1830, resulting in Greece's independence.

3. Bosnia: Bosnia did not gain independence from the Ottoman Empire in 1830. It remained under Ottoman rule until the late 19th century.

4. Romania: Romania gained independence from the Ottoman Empire in 1877-1878 during the Russo-Turkish War. Therefore, it is not the correct answer.

Based on this analysis, the correct answer to the question is Greece. Greece gained its independence from the Ottoman Empire in 1830.