As air bubble rises from bottom to the top of a water tank, the size of the bubble increases. It happens, because
A. the pressure exerted by water on the bubble decreases as the height of the water column above it decrease.
B. the density of water increases as we move downwads.
C. at constant temperature, pressure inside the air bubble are volume of the bubble inversely proportional to each other.
D. Both 1 and 3
