A particle is moving in a straight line and its distance x from a fixed point on the line at any time t seconds is given by, x = t4/12 2t3/3 + 3t2/2 + t + 15. What is the minimum velocity?

• A. 1 cm/sec
• B. 2 cm/sec
• C. 3 cm/sec
• D. 4 cm/sec