The graph indicates how the car’s velocity changes over time. Which statement is correct?
- AThe car accelerates for $2\,\text{s}$, then stops for $4\,\text{s}$ and then reverses.
- BThe car accelerates at $12\,\text{m s}^{-2}$ for $2\,\text{s}$.
- CThe car travels a distance of $36\,\text{m}$ in the first $4\,\text{s}$.
- DThe car travels a distance of $48\,\text{m}$ in the last $4\,\text{s}$.