PLEASE HEL Velocity vs time graph

Time (sec) Displacement (m) Velocity (m/s)

0 0 0

0.5 1.25 5

1 5 10

1.5 11.25 15

Based on the data table, find the acceleration and then predict the velocity at the time 3.5 seconds.
A) The acceleration is 5 m/s/s and the velocity at a time of 3.5 seconds will be 35 m/s.
B) The acceleration is 10 m/s/s and the velocity at a time of 3.5 seconds will be 35 m/s.
C) The acceleration is 10 m/s/s and the velocity at a time of 3.5 seconds will be 70 m/s.
D) The acceleration is 5 m/s/s and the velocity at a time of 3.5 seconds will be 17.5 m/s.
I really need the explanation