For which appraisal assignment is the gross rent multiplier (GRM) method MOST appropriate?

The Gross Rent Multiplier (GRM) is best suited for valuing small residential income properties, typically 1-4 units, where monthly rental income is a primary valuation factor. Among the options, a residential duplex (two units) fits this criteria perfectly. Larger multi-unit properties and commercial properties typically require more complex income capitalization approaches.