According to Porter’s theory, which factors play a key role in providing a competitive edge to a country?

A.
factor conditions; supply conditions; related and supporting industries; firm strategy, structure, and rivalry
B.
factor productivity; demand conditions; related and supporting industries; firm strategy, structure, and rivalry
C.
factor conditions; demand conditions; related and supporting industries; firm profits
D.
factor conditions; demand conditions; related and supporting industries; firm strategy, structure, and rivalry

Porter's model of diamond works on the basis of four points. These are determinants that he theories as declining factors. These factors are factor conditions, demand conditions, related and supporting industries and structure plus rivalry of firms. These are called as five force model, as these determine the natural inherited factors.