Specialization leads to A. Countries being more efficient, producing more goods and services, and being able to trade more with other countries shifting the PPC right B. Countries being more efficient, producing more goods and services, and being able to trade more with other countries shifting the PPC left C. Countries being less efficient, producing less goods and services, and being able to trade less with other countries shifting the PPC right D. Countries being less efficient, producing less goods and services, and being able to trade less with other countries shifting the PPC left