DrGoldfinger Decides to Invest in Companies Which He Believes Can

Dr.Goldfinger decides to invest in companies which he believes can "improve the productivity and efficiency" of health care services.How can Dr.Goldfinger strive to achieve this productive efficiency?

A) by investing in companies that produce goods and services based on consumer preferences
B) by investing in companies that produce goods and services at the lowest possible cost
C) by investing in companies that fairly distribute their products and services
D) by investing in companies that produce up to the point where the marginal benefit of the last unit produced is equal to the marginal cost of producing it