nayana-c1.867c992ae9100904cc61c84591adf0f8f863e0387e30f0d0dbc86640e9f50a1a.en.train.200602

The task

Which of the following statements is true regarding the uncertainty in predicted exposure concentrations? A. Predicted exposure concentrations are highly accurate for all contaminants. B. Predicted exposure concentrations range over 6-9 orders of magnitude, indicating high uncertainty. C. The uncertainty in predicted exposure concentrations is primarily due to the biodegradation of chloroform. D. The model provides exact predictions for all contaminants. Return only the single uppercase letter of the correct option.