Helena Fogarty often adds new Mi Ola bathing suits in different designs and colors depending on what's trendy at the moment. Such changes represent for Mi Ola. a. aesthetic modifications
b. line extensions
c. quality modifications
d. product innovations

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.