When Housing Prices Began to Decline After Their Peak in 2006,many

When housing prices began to decline after their peak in 2006,many subprime borrowers found that their mortgages were "underwater." This meant that

A) the value of the house fell below the amount of the mortgage.
B) the basement flooded since they could not afford to fix the leaky plumbing.
C) the roof leaked during a rainstorm.
D) the amount that they owed on their mortgage was less than the value of their house.