[单选题]
The coil of a generator h6kmb,a*8 pwk qd,qh6ias 5t1g6+5h 10upf wn.o g cpxqw3r0 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. $400 \; V$
