The diagram shows the appearance of a room that is warmed by a radiator. The line with arrows from X to Y represents the route taken by the convection current in the air. Which row gives the correct air temperature and air density at X and at Y?
- Aair temperature higher at X; air density higher at X
- Bair temperature higher at X; air density higher at Y
- Cair temperature higher at Y; air density higher at Y
- Dair temperature higher at Y; air density higher at X