This is an example of the Pygmalion effect.
The Pygmalion effect or commonly known as the Rosenthal Effect is credited to Rosenthal and Jacobsen.
This Pygmalion effect is a type of self-fulfilling prophecy wherein you think something will happen and you may consciously make it happen.
The correct answer is letter A.
Explanation: South Africa has the second largest economy in Africa. In the sectors of economy the main are manufacturing, wholesale and retail trade, transport, mining, agriculture, financial services and of course tourism.
Kenya has one of the fastest growing economies in Africa, their growth is by encouraging trade, small business, developing sectors of energy and agriculture. Agriculture is the main reason of economic growth.