An air bubble rises from the bottom to the top of a water dam which is 40m deep. The volume of the bubble just below the surface is 2.5cm³. Find its volume at the bottom of the dam, if atmospheric pressure is equivalent to 10m water

• A.0.0cm³
• B.2.0cm³
• C.1.6cm³
• D.0.625cm³
• E.0.5cm³