Please rank the following based on their importance in growth of productivity (output per worker). If items have roughly the same importance, you may place them in any order amongst themselves. Items that do not affect productivity growth should be left unplaced.

Which situation is the best example of opportunity cost? a country chooses to produce bananas instead of wheat. a country chooses to invest in manufacturing and agriculture. a country chooses to specialize in producing paper products. a country chooses to export all of its products.