[单选题]
A 1.53-kg mass hangs on a rope wrappedo6 m. p7h4aqkx around a frictionled 24/lmcq5ihd1xm ry n+q;x1t ss disk pulley of mass 7.07 kg and radius 66.0 cm. Whhndil4+2/1rt1qq; 5 xdmxcmyat is the angular acceleration of the pulley?
A. $4.49 \; rad/s^2$
B. $7.98 \; rad/s^2$
C. $9.87 \; rad/s^2$
D. zero
