A Car Starting from Rest Accelerates at a Constant 2

Multiple Choice

A car starting from rest accelerates at a constant 2.0 m/s² for 10 s.It then travels with constant speed it has achieved for another 10 s.Then it finally slows to a stop with constant acceleration of magnitude 2.0 m/s².How far does it travel after starting?

A) 200 m
B) 300 m
C) 400 m
D) 500 m