[单选题]
A car is negotiatingx*9 dhq-j(mi 4m/qwg ks-dt(g a flat curve of radius 50 m with a speed of 20zk nim,+,wz*6 egjd-u m/s. The centripetal form*g ui,j+6 znkz,ew-dce provided by friction is $1.2 \times 10^{4} \; N$. What is the mass of the car?
A. $500 \; kg$
B. $1000 \; kg$
C. $1500 \; kg$
D. $2000 \; kg$
