From the options provided, the three countries that boast petroleum as their top export are:
Libya, South Sudan, and Nigeria.
Among your options, these countries focus on exports primarily derived from petroleum.
- Libya: Oil is the dominant sector of the economy.
- South Sudan: Oil production has been the main economic driver since its independence.
- Nigeria: One of the largest oil producers in Africa, with petroleum being a significant part of its export economy.
Kenya and South Africa, on the other hand, have more diversified economies with other significant exports that are not centered on petroleum.