Which of the following describes a watershed
a.An approach to stormwater management that protects restores or mimics the natural water cycle
b.The natural continuous process where water falls from the sky as precipitation infiltrates or runs off the land surface and returns to the sky through evaporation or transpiration
c. An area of land that drains all the rainfall and streams to a common outlet such as the outflow of a reservoir mouth of a bay or any point along a stream channel.