A market economy is sometimes referred to as a command economy

Which of the following statements is true about the economies of Africa?

A) South Africa's main export is oil. B) Nigeria is an upper-middle income country. C) Nigeria and South Africa, account for over two-thirds of sub-Saharan African GDP. D) South Africa is the largest country in Africa, and has a lower-middle income economy.

Working Conditions

(a) The experience, training, education, and ability required to perform a job under consideration—not with the skills any employee may possess (b) The measurement of the physical or mental exertion needed for performance of a job (c) The extent to which an employer depends on the employee to perform the job as expected, with emphasis on the importance of job obligation (d) The physical surroundings and hazards of a job, including dimensions such as inside vs outside work, excessive heat or cold, fumes, and other factors relating to poor ventilation