If the Displacement of an Object Is Given in SI $\Delta$

Multiple Choice

If the displacement of an object is given in SI units by $\Delta$ x = -5t + t ², at t = 2 s its velocity and acceleration are, respectively: (Hint: Use dimensional analysis along with the equations for motion with constant acceleration.)

A) positive, positive.
B) positive, negative.
C) negative, negative.
D) negative, positive.