Two identical open containers are fitted with the same pressure sensor at their bottoms. Container A holds a 0.50m column of water while Container B holds a 0.50m column of an unknown liquid. The sensor shows a smaller reading for Container B than for Container A. Which inference is correct?
a) The unknown liquid has the same density as water.
b) Pressure at a given depth is independent of liquid density, so the reading difference is irrelevant.
c) The unknown liquid is less dense than water.
d) The unknown liquid is denser than water.