How Do Semiperiphery Regions Compare with Periphery Regions

How do semiperiphery regions compare with periphery regions?

A) Periphery regions are growing more rapidly than semiperiphery regions.
B) Semiperiphery regions are growing more rapidly than periphery regions.
C) Periphery regions export primarily manufactured products,whereas semiperiphery regions export primarily raw materials.
D) States can move from the semiperiphery to the periphery,but not from the periphery to the semiperiphery.