[单选题]
A 1.53-kg mass hangs on a rope wrapped around a frsu:6;.hfv 8.hegjz xig / :ingictionless diymtu 1co-, p imo/f29vsk pulley of mass 7.07 kg and radius 9cu ,o p o1f/v2m-timy66.0 cm. What 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
