Consider the statements about mechanical events. I. Discounting the friction box/floor, it is as easy to drag a 30 kg box on Earth as it is on the ...

Consider the statements about mechanical events.
I. Discounting the friction box/floor, it is as easy to drag a 30 kg box on Earth as it is on the Moon.
II. A solid iron cube exerts a pressure 'p' on its support base. Doubling its dimensions, the pressure will be equal to 2p.
III. The pressure exerted by a liquid at rest on the bottom of the container containing it is independent of the type of liquid considered.
Which statement(s) is(are) correct?

I. Discounting the friction box/floor, it is as easy to drag a 30 kg box on Earth as it is on the Moon.
II. A solid iron cube exerts a pressure 'p' on its support base. Doubling its dimensions, the pressure will be equal to 2p.
III. The pressure exerted by a liquid at rest on the bottom of the container containing it is independent of the type of liquid considered.
a) only I;
b) only I and II;
c) only II;
d) only II and III;
e) I, II and III.