The graph shows position as a function of time for two trains running on parallel tracks. Which statement is true?

Options

• Option A

  At time tᵦ both trains have the same velocity.

• Option B

  Both trains have the same velocity at some time after tᵦ.

• Option C

  Both trains have the same velocity at some time before tᵦ.

• Option D

  Somewhere on the graph both trains have the same acceleration.