1. If a certain combination of goods or services lies outside theproduction possibilities curve of an economy, which of thefollowing is true? (     )

1. Effective trade barriers have reduced foreign imports into the economy.
2. New technology is being used in production.
3. Resources are not available to achieve that combination of goods or services.
4. Resources are not being used efficiently to achieve that combination of goods or services.
5. Resources are being used at a more rapid rate than they were in the past.

3. The concept of opportunity cost would no longer be relevant if?        ?

1. poverty in an economy no longer existed
2. the supply of all resources were unlimited
3. resources were allocated efficiently
4. real wages were flexible
5. all current incomes were invested in technological research