A remote-controlled vehicle is moving across the surface of a planet. It detects an obstacle in front of it and transmits a radio message to the control room from which it is operated. The control room is $2.4 \times 10^6\,\text{km}$ from the vehicle. The control room then sends a message back to the vehicle instructing it to stop. What is the minimum time that passes between the vehicle detecting the obstacle and receiving the return message from the control room?
- A$8.0\,\text{ms}$
- B$16\,\text{ms}$
- C$8.0\,\text{s}$
- D$16\,\text{s}$