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.
-Who is the servient tenement?

A) Angela
B) Bill
C) There is no servient tenement because this is an easement in gross
D) This is a license.