Some Species in the Genus Clusia Start Out as Epiphytes

Multiple Choice

Some species in the genus Clusia start out as epiphytes but eventually can take on the tree form, a transformation that is facilitated by a property known as facultative CAM. This property allows them to switch between different types of photosynthesis. Specifically, they are switching between

A) C₄ and CAM.
B) C₃ and CAM.
C) C₃ and C₄.
D) C₃, C₄, and CAM.