South Carolina residential property assessment ratio is:

Option A is incorrect because while some states assess property at 100% of market value, South Carolina is not one of them. Assuming all states use 100% assessment is a common misconception that leads to overestimating property taxes.

Option C is incorrect because 50% assessment ratio is not used for owner-occupied residential properties in South Carolina. This ratio might apply to other property types or in other states, but not to primary residences in SC.

Option D is incorrect because 10% assessment ratio is too high for owner-occupied residential properties in South Carolina. While some commercial properties or non-primary residences might be assessed at higher rates, primary residences receive the 4% preferential rate.