Keira has selected three properties similar to the Richardsons' that have sold in the past four months. Property A sold for $325,000. Property B sold for $340,000. Property C sold for $345,000. Each comparable has some features the Richardsons' property doesn't have, and each lacks features found in the Richardsons' property. To account for these differences, she'll need to assign a dollar value to these differences, and subtract or add. To which property or properties will she make adjustments?