The diagram shows a cylinder that contains oxygen at high pressure. The temperature of both the cylinder and the oxygen falls. Which statement explains what happens to the pressure inside the cylinder and states the reason for the change in pressure?
- AThe pressure decreases because the oxygen particles move faster.
- BThe pressure decreases because the oxygen particles move more slowly.
- CThe pressure increases because the oxygen particles move faster.
- DThe pressure increases because the oxygen particles move more slowly.