[单选题]
02.17: The motion of a c17g w;dv vja.8 pik8foircus clown on a unicycle moving im 6 .s3ume/-7jaleodhn a straight line is shown in the graph be .-mdals6/e7 jm3uhoelow.
What would be the acceleration of the clown at 5 s?
A. $1.6\;m/s^2$
B. $2.0\;m/s^2$
C. $3.4\;m/s^2$
D. $8.0\;m/s^2$
E. none of the above