An Air Bubble 20 M Below the Surface of a Lake

An air bubble 20 m below the surface of a lake has a volume of 0.02 m³. The bubble then rises to the surface. Assuming the temperature of the lake is uniform, what is the volume of the bubble just before it breaks through the surface?

A) 0.02 m³
B) 0.04 m³
C) 0.06 m³
D) 0.08 m³
E) 0.10 m³