A converging lens (f = 15 cm) and a second converging lens (f = 20 cm) are placed 40 cm apart, and an object is placed 30 cm in front of the first converging lens. The object's height is 2 cm. What is the total magnification of the system?
a) 1.2
b) 2.5
c) 3.0
d) 4.5