In which way are the governments of Saudi Arabia and Oman most similar?

Their rulers are related.
They both have absolute monarchies.***
They have newly written constitutions.
Their structures descend from Ottoman caliphs.

Right.

To determine which way the governments of Saudi Arabia and Oman are most similar, we need to examine the information given. In this case, the correct answer is "They both have absolute monarchies." Here's how you could arrive at this answer:

1. Saudi Arabia and Oman both have rulers who are related. While this is true, it does not fully answer the question, as it only highlights a similarity between the ruling families.

2. Both countries having newly written constitutions is not mentioned in the given information, so we can rule out this option as a similarity between Saudi Arabia and Oman.

3. The descent of their governmental structures from Ottoman caliphs is not mentioned in the question, and it is not a commonly known fact about these countries. Thus, we can eliminate this option as well.

4. The last option is "They both have absolute monarchies." Based on the information provided, this is the most directly related and accurate answer. Saudi Arabia and Oman are indeed both governed by an absolute monarchy system, where the rulers hold total power and authority.

By analyzing the given information and using logical reasoning, we can conclude that the most similar aspect of the governments of Saudi Arabia and Oman is that both countries have absolute monarchies.