[单选题]
02.18: The motion of a circus clown on a unicycleqex2:)qafgr q26 jq8znxyn0+bf+1ki3b+ d4 7hnpu k mmoving in a straight line is shown in the gr nif7byhxd0+m43n b 1n+ k+kpuaph below.
After 12 seconds, how far is the clown from her original starting point?