Good examples of these countries could be Saudi Arabia, Yemen, the UAE (United Arab Emirates), and other Middle-Eastern countries.
Take notes, and don't go online like this and cheat. Your in school for a reason.
Petroleum engineering $93,000-$157,000 a year
France
Canada
The United States is the world's largest producer of petroleum.
Nigeria has the most significant petroleum reserves in Africa.
Canada
Germany has the largest economy, but the citizens of Liechtenstein make the most money (per capita).
Many countries produce petroleum, but Saudi Arabia produces the most.
The answer is kingdom of Saudi Arabia
Venezuela
In terms of the degree level, a PhD would ensure you the most money. A PhD or Doctoral Degree is the highest degree awarded by Universities. In terms of a Major that earns the most money their first year into their fields would be Petroleum Engineering according to the source below.