A $100\,\text{m}$ race is begun by firing a gun. At that instant, the gun produces both a bang and a puff of smoke. When will the finishing judge notice the smoke, and when will 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 $0.3\,\text{s}$