[单选题]
A conducting rod of lc sjx;9 e+2 zauh bse/9fnsszl)v 5;n/engtv(xtks :1vv. a4vc a-ih $L$ is moved in a region of uniform magnetic field $B$ to light the filament bulb with a resistance of $R$. The direction of the magnetic field is out of plane.
What is the maximum output power of the bulb?
A. $\frac{BvL}{R}$
B. $\frac{B^2v^2L^2}{R}$
C. $\frac{B^2v^2L^2}{R^2}$
D. 0
