[单选题]
The coil of a generad-2 rri,ujuv;*y tte8va x5f9 tor has 50z +.douv 14l aioa;pl, loops and a cross-sectional area of $0.25 \; m^{2}$. What is the maximum $emf$ generated by this generator if it is spinning with an angular velocity of 4.0 rad/s in a 2.0 T magnetic field?
A. $50 \; V$
B. $100 \; V$
C. $200 \; V$
D. $400 \; V$
