More gas, perhaps, but the pressure is determined by other conditions than the height of the gas in the cylinder. If you are holding a ball in your hand, the force you need to hold it up is the same whether you hold it high or low. Still the same. See the argument above. In cases B and C the pressure and volume are both the same.
C is at a higher temperature.
Since both gases are of the same material, more molecules means more mass. For A and B the pressure and temperature are the same but the volume of A is bigger. 5 x 10 -26 m 3 for itself. Since the cubes have a volume of 5 x 10 -26 m 3 one side is obtained by taking the cube root. Notice that the molar mass is for a gram-mole, not a kilogram mole.