Four identical submarines P, Q, R and S are moved from one depth to a deeper or shallower depth in water of uniform density. The starting and ending depths of each submarine are shown in the diagram. Which row gives the correct change in pressure from the starting depth to the ending depth of each submarine?
- Aleast change in pressure: submarines P and Q; greatest change in pressure: submarines R and S
- Bleast change in pressure: submarines P and Q; greatest change in pressure: submarine R only
- Cleast change in pressure: submarine P only; greatest change in pressure: submarines R and S
- Dleast change in pressure: submarine P only; greatest change in pressure: submarine R only