In the following figures the velocity-time graphs for three particles 1, 2 and 3 are shown. The magnitude of average acceleration of the three particles, over 10 s, bear the relationship

A

$$a_1 > a_2 > a_3$$

B

$$a_2 > a_1 > a_3$$

C

$$a_3 > a_2 > a_1$$

D

$$a_1 = a_2 = a_3$$