[单选题]
A disc of mass m and radius r l:ic39re s gjbriav5,,ce.- f9,eu7z mo1+ ssq(,cdbw j7jvxrolls without slipping from rest down an inclined v 7 z19ow s+c,uxbesdjq (mj,7plane.
The moment of inertia of the disc is $frac{1}{2}mr^2$.
Which of the following is correct about the linear acceleration of the disc and the net torque?
A. Linear Acceleration is $\frac{2}{3}$gsinθ ; Net Torque is $F_fr$
B. Linear Acceleration is $\frac{2}{3}$gsinθ ; Net Torque is $mgsinθ$
C. Linear Acceleration is $gsinθ$ ; Net Torque is $F_fr$
D. Linear Acceleration is $gsinθ$ ; Net Torque is $mgsinθ$