Suppose that all the rainfall that fell during an average year on a typical surface in central pennsylvania just stayed there as a layer of water (and all the snow melted, and the melt just stayed there). if at the end of the year you were standing on that surface (assuming you are a typical-sized human being), what would be true? (pennsylvania gets about the same amount of precipitation as the average for the world.)

you would need your scuba gear, or a really long snorkel, to keep from drowning because the water would be way over your head.

the water would be up around your waist or chest, but you'd still be able to breathe.

the water would be over your ankles, but no deeper.

the bottom of your toes would be wet, but not much else.

the water would just cover your toes, but no deeper.