A car moves along a straight, level road. The graph displays how the car’s velocity $v$ changes with time $t$ over $6.0\,\text{s}$ of its motion. The car’s brakes are used from $t = 1.0\,\text{s}$ until $t = 4.0\,\text{s}$. What distance does the car cover during the time the brakes are applied?
- A$21\,\text{m}$
- B$45\,\text{m}$
- C$67\,\text{m}$
- D$83\,\text{m}$