The evolutionary theory of emotions is supported by a. cross cultural studies b. schachter's epinephrine studies c. brain-scan studies d. zuckerman's sensation-seeking studies

What does the ricardian theory state? a. countries should produce all goods and services if they canb. countries should not produce goods and services that minimize opportunity costsc. countries should import goods and services if they are cheaper in other countriesd. countries should export all goods and services if they make a profit