___________ is the foundation for innovation

Stocks A, B, C, and D have returns of 10%, 20%, 30%, and 40%, respectively. What is their variance?

A) 66.67% B) 166.67% C) 4.08% D) 2.15%

All of the following statements characterize the comparative advantage principle except ________

A) the principle provides the foundation for modern international trade B) cost of production is less important than the ratio of production C) the exportation of labor-intensive goods should be emphasized D) nations can trade profitably even if manufacturing costs are high