An $100\,\text{m}$ race begins when a gun is fired. The gun produces a bang and a puff of smoke at the same instant. At what time does the finishing judge see the smoke, and at what time does he hear the bang?
- Asees the smoke almost immediately; hears the bang almost immediately
- Bsees the smoke almost immediately; hears the bang after about $0.3\,\text{s}$
- Csees the smoke after about $0.3\,\text{s}$; hears the bang almost immediately
- Dsees the smoke after about $0.3\,\text{s}$; hears the bang after about $0.3\,\text{s}$