In His Study of the Foraging Behavior of Bumblebees, D

In his study of the foraging behavior of bumblebees, D. W. Inouye noted that both Bombus appositus and Bombus flavifrons feed from both larkspur and monkshood flowers when each is the only bumblebee species present. However, when both species are present, B. appositus feeds on only larkspur and B. flavifrons feeds on monkshood. This behavior is an example of

A) intraspecific competition.
B) predation.
C) habitat fragmentation.
D) resource partitioning.
E) aggressive mimicry.