[单选题]
A 1.53-kg mass hangs on a rope wrapped aroun2nodscov5 xo5 i(6aw 1d a frictionless disk pull. aqp py.33wh3jaugp8 ey of mass 7.07 kg and radius 66.0 cm. Whuqayah w3g8 j 3.pp3.pat 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
