In the driveway scenario, after the neighbor used the driveway for years based on an oral promise, the owner sells the servient estate to a couple who take title without any mention of the arrangement. When the neighbor tries to use the driveway after the sale, the couple tells her to stop. What is the effect on the neighbor's use rights?

• A. The license cannot be revoked because it was oral.
• B. The license is revoked upon transfer of the servient estate; there is no evidence of detrimental reliance.
• C. The neighbor has acquired a prescriptive easement despite the owner's permission.
• D. The couple's notice binds them to permit continued use.

Answer: (B)