What is a key "take-home message" about Easter Island?
A) making and placing large stone statues is a waste of time
B) tropical soils are insufficient for growing enough crops for a population to be self-sustaining
C) Humans that live in tropical areas will not die of exposure to extremely low temps
D) an island population must live as responsible stewards of its resources
E) the invasive brown tree snake can wipe out an entire population of humans in a short amount of time
