Who is credited with first using cost-benefit analysis?

a. Adam Smith

b. Jules Dupuit

c. Alfred Marshall

d. John Maynard Keynes

Alfred Marshall is credited with first using cost-benefit analysis. The correct option among all the options given in the question is option "b". The actual fact is that the concept was first brought into existence by Jules Dupuit in an article in the year 1848. His concept was first put to work by Alfred Marshall later on.

Alfred Marshall (Good Luck)