The Way Energy Flows Through Ecological Communities Is Different from the Way

The way energy flows through ecological communities is different from the way nutrients flow through ecological communities because

A) there is a net gain in energy as it is transferred through trophic levels.
B) nutrients are altered when they are transferred among organisms.
C) the availability of nutrients to organisms is constant over time.
D) energy is ultimately lost from the system as heat.
E) nutrients are not influenced by how organisms acquire them.