Final answer:
Riparian rights, prescriptive rights, and adjudicated rights are generally considered grandfathered water rights, while prior appropriation rights are not.
Step-by-step explanation:
Among the options provided, the answer is B) Prior appropriation rights and D) Adjudicated rights.
Riparian rights are water rights based on the ownership of land adjacent to a water source, such as a river or stream. Prior appropriation rights refer to water rights granted to the first person who uses the water for a beneficial purpose, regardless of land ownership. Prescriptive rights refer to water rights acquired through continued use over a long period of time, while adjudicated rights are water rights confirmed by a court.
In summary, riparian rights, prescriptive rights, and adjudicated rights are generally considered grandfathered water rights, while prior appropriation rights are not.