Acceleration-time graphs in 1D kinematics

A body which is initially at rest experiences a change in velocity and travels in a straight horizontal line as shown below (graph drawn to scale, take positive v as rightwards motion).

Which of the following shows the correct graph for the acceleration of the body over the same time period, and the sign of the displacement of the body after 5 s?

Acceleration Graph A

Acceleration Graph B

Acceleration Graph C


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