Correct Answer :
A. Production cost
Engineering Cost Curves ? The engineering cost curve are derived with the help of engineering production function . The production function specified the techniques of production, the embodiment of labor and capital etc. It means that each production method is divided into sub activities corresponding to the various physical and technical phases of production for the particular commodity. Engineering production method/function are characterized by a limited number of methods of production. The production iso-quants are kinked reflecting that the factor substitutability is limited. It means that the factor of production can be substituted is only possible at kinked of isoquants.}