Use the Following Information to Answer the Question

Multiple Choice

Use the following information to answer the question.
Healthy individuals of Paramecium bursaria contain photosynthetic algal endosymbionts of the genus Chlorella. In addition, P. bursaria also ingests bacteria.
Which term most accurately describes the nutritional mode of healthy P. bursaria?

A) photoautotroph
B) photoheterotroph
C) chemoautotroph
D) mixotroph