[单选题]
02.18: The motion of a circus cljmo-uvqiqb)-9hs,/ tt*7m;f uriu r 9own on a unicycle moving in a u (lpx8i 3nh)/xm1wyjstraight line is shown in the graph below. wu yxmn8(h1xil/j3)p After 12 seconds, how far is the clown from her original starting point?