South Africa began importing oil from other countries.
Answer: Option C.
Step-by-step explanation:
Import means getting a particular good from other countries in the world which is demanded in your own country but the domestic production can not meet that demand.
In the situation which has been given in the question, the production of oil of the country is less than the demand of the oil in the country. So to meet the rest of the demand that can not be met with the domestic production, South Africa has to import oil from other countries.