Which of the Following Is True About the Regulation of Pesticide

Which of the following is true about the regulation of pesticide use by the EPA?

A) A pesticide may be legally registered only if it will perform its intended function without posing unreasonable risk to humans or the environment.
B) The EPA may balance the economic and social costs of use of a pesticide in deciding whether to register it.
C) Once a pesticide is registered, the registration cannot be canceled for five years.
D) Both (a) and (b) .
E) Both (a) and (c) .