I know this is physics but its also math (Look its math in science ok) Interpreting Velocity vs Time Graphs

A graph titled velocity versus time has horizontal axis time (seconds) and vertical axis velocity (meters per second). A line has 3 straight segments. Line segment A runs from 0 seconds 0 meters per second to 4 seconds 40 meters per second. Then segment B runs to 9 seconds 40 meters per second. Then segment C runs to 10 seconds 10 meters per second.

Use the graph to determine acceleration and velocity.

Which segments show acceleration?

What is the velocity of segment B?

Choices for the first question:

A. A and B

B. A and C

C. B and C

Choices for the second question:

A. 8 m/s

B. 10 m/s

C. 40 m/s

D. - 40 m/s