The graph between the displacement `x` and time `t` for a particle moving in a straight line is shown in the figure. During the interval `OA, AB, BC` and `CD` the acceleration of the particle is
`OA, AB, BC, CD`
A. `{:(OA,AB,BC,CD),(+,0,+,+):}`
B. `{:(OA,AB,BC,CD),(-,0,+,0):}`
C. `{:(OA,AB,BC,CD),(+,0,-,+):}`
D. `{:(OA,AB,BC,CD),(-,0,-,0):}`
