[单选题]
A 1.53-kg mass hangsh:0za2p p gat5lu.xm8+lts 6wm6 sv5c,. jur,iorj49v(e biz on a rope wrapped around a frictionless disk pulley of mass 7.07 kg and radius 66.0 cm. What is the angular acceleration of thir w czs6t9v,,+j m6u.ior( be45ljvse pulley?
A. $4.49 \; rad/s^2$
B. $7.98 \; rad/s^2$
C. $9.87 \; rad/s^2$
D. zero
