A uniform electric field points in the positive x direction and has a magnitude of 40 N/C. What is the total flux through a rectangle with height 20 cm and width 45 cm? The rectangle lies in the y-z plane. Choose the correct option:
a) 0 Nm²/C
b) 1.2 Nm²/C
c) 2.4 Nm²/C
d) 3.6 Nm²/C