In What Way(s),if Any,is a Chemoautotroph Different from a Chemoheterotroph

Multiple Choice

In what way(s) ,if any,is a chemoautotroph different from a chemoheterotroph?

A) Chemoautotrophs can produce carbon-containing compounds for use in metabolism or for the building of its structures,whereas a chemoheterotroph must consume such compounds.
B) Chemoautotrophs use light energy to produce carbon-containing compounds,whereas a chemoheterotroph uses inorganic compounds.
C) Chemoautotrophs use organic compounds as an energy and carbon source,whereas chemoheterotrophs use inorganic compounds as an energy and carbon source.
D) Chemoautotrophs and chemoheterotrophs are not different from one another with respect to energy and carbon sources.