The run-time stack: A. points out syntax errors in a Java program
B. helps keep track of the execution of recursive and non-recursive programs
C. only helps in the execution of recursive programs
D. is part of the Java API

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.