I Want to Know Why There Is So Much Water

Multiple Choice

I want to know why there is so much water collecting in my basement.I know that the basement walls leak a little bit, allowing enough water in to stain the walls.But right now, even the carpeting is soggy.So I conclude that I also have a leaky pipe.Which method did I use to determine this?

A) agreement
B) difference
C) joint method
D) concomitant variations
E) residues