A Community Ecologist Defined a Rotting Log in a Forest

A community ecologist defined a rotting log in a forest as a community, and she set up a series of observations and experiments to study it.When defining this community, the researcher most likely considered all of the following aspects except that the log had a

A) relatively distinct boundary.
B) specific number of species known in advance.
C) relatively distinct set of interacting species.
D) relatively self-contained food web.
E) size and location that could be easily studied.