Frederick taylor believed that management and labor should cooperate and work together to meet goals. he was the first to suggest that the primary functions or managers should be planning and training. He created four principles of managemnt that are still used today. Which one is NOT one of taylors managemt Principles?

The prebisch–singer hypothesis concludes that: a. technology lowers the cost of manufactured products, so developing countries should see an increase in their terms of trade. b. developing countries experience a long-run decline in their terms of trade, as the demand for primary products in higher-income countries declines relative to their demand for manufactured goods. c. because of unfair trading practices, labor in developing countries is exploited. d. opec has been responsible for a slowdown in the world's standard of living.