[单选题]
A car goes around a curve of radit7ln:0wl lk 7f co+6 8kydwm(lu8i.srwlkvm bl 56 )qz;s $r$ at a constant speed $v$. What is the direction of the net force on the car?
A. toward the curve's center
B. away from the curve's center
C. toward the front of the car
D. toward the back of the car
