A man owned a 25-acre tract. He conveyed 20 acres to a developer by warranty deed, while retaining the five acres. The deed to the 20-acre tract stated: 'It is a condition of this deed that all owners, their heirs and assigns, of any portion of the 20-acre tract shall use the land for single-family residences only.' The developer subdivided and sold 20 lots with single-family homes. A woman bought one lot and intends to build an addition and rent it to college students. A neighbor complained; what is the correct principle?

• A. Equitable servitudes can be enforced only by the developer.
• B. A neighbor may enforce the covenant running with the land because it touches and concerns the land.
• C. Equitable servitudes are not subject to the Rule Against Perpetuities.
• D. The restriction cannot be enforced because the neighbor does not own land in the subdivision.

Answer: (B)