Since Saudi Arabia's oil production is controlled by the government then its economy is a command.
I believe The answer is A.a class system
When forming friendships, people find several forms of similarity to be attractive. According to research similarity in personalities is the strongest predictor of initial attraction. Some researchers have suggested that similarity causes attraction because people are more likely to associate with those who are similar to them in characteristics such as age, race, religion, social class, personality education, intelligence, and attitude.
The legislative branch of the U.S. government is called Congress. Congress has two parts, the Senate and the House of Representatives. Congress meets in the U.S. Capitol building in Washington, DC.
