Multiple choice. The $4$ cost competitive advantage methods that can be considered to maintain satisfactory profit margins are:

Question $29$ options:

Re$-$engineering, Efficient Labour, Methods of Delivery, and Market Penetration

Product Design, No$-$Frills Goods and Services, Product Innovations, and Experience Curves

Diversification, Product Design, No$-$Frills Goods and Services, and Experience Curves

No$-$Frills Goods and Services, Product Innovations Diversification, and Market Penetration$$