What Separates Illegal Flipping and Legitimate Fixing and Reselling of Houses

Multiple Choice

What separates illegal flipping and legitimate fixing and reselling of houses?

A) Foreclosed homes are appraised at a low price and resold at a higher price.
B) The actual costs to renovate a home are inflated to increase the home's selling price.
C) An individual home is bought and resold multiple times at inflated prices.
D) Renovated homes are resold with few changes.