Odegaard's Study Estimating the Number of Tropical Forest Beetles Illustrates

Odegaard's study estimating the number of tropical forest beetles illustrates that sampling from multiple sites

A) is not affected by the sampling effort devoted to estimation.
B) usually requires only limited effort by ecologists.
C) can usually be made more easily by sampling only a single indicator taxon.
D) is intensively all that is necessary to calculate species diversity.
E) must, to be useful, be based on standardized sampling techniques.