Mr) Jackson Owns a Home That Is Situated at the Bottom

Mr) Jackson owns a home that is situated at the bottom of a hillside. In the winter time during heaving rainstorms his home is subject to damage by flooding so he dug a trench along the back of his property to divert water. This action would be:

A) Legal if the water is diverted to a vacant lot
B) Illegal because you cannot divert surface waters to another property to the detriment of the other property
C) Legal because every owner has the right to protect his property against flooding
D) Illegal because he is violating the riparian rights law