Angela Holds an Easement That Prevents Bill from Planting Willow

Multiple Choice

Angela holds an easement that prevents Bill from planting willow trees. Angela and Bill are adjoining landowners, and Angela obtained the easement because she felt the roots of willow trees would harm her in-ground swimming pool.
-What type of easement has been granted?

A) An easement in gross
B) A negative easement appurtenant
C) A quasi easement
D) An easement by prescription