Which of the following statements about species-accumulationcurves is TRUE?
A) Species-accumulation curves are used to estimate regional, orgamma, diversity.
B) The precise shape of a species-accumulation curve depends onthe order in which samples are processed.
C) Species-accumulation curves are not needed when a completecensus is available.
D) Species richness tends to be underestimated when curves arebased on too few samples.