-Lectures in Microeconomics Can Be Delivered Either by an Instructor

Multiple Choice

-Lectures in microeconomics can be delivered either by an instructor (labor) or a movie (capital) or any combination of both.Yet,it gets harder and harder to substitute more movies for an instructor the more movies are already used.Which graph in the above figure best represents the isoquants for lectures in microeconomics when capital per day is on the vertical axis and labor per day is on the horizontal axis?

A) Graph A
B) Graph B
C) Graph C
D) Graph D