Ganesh and Madonna Own Neighbouring Pieces of Land

Ganesh and Madonna own neighbouring pieces of land.One of those parties owns Blackacre and the other owns Whiteacre.Ganesh has a property interest that allows him to drain his reservoir into Madonna's field once a year and prohibits Madonna from erecting any impediment to the drainage ditch.Which of the following statements must be TRUE?

A) Ganesh probably enjoys the benefit of a restrictive covenant.
B) Ganesh must have personally paid for the right to drain his reservoir into Madonna's field.
C) Madonna has granted a lease to Ganesh.
D) If Whiteacre is the servient tenement, then it must belong to Madonna.
E) Madonna has granted a licence to Ganesh.