If the EPA decides that a pesticide poses a risk to consumers, what can the EPA do?

The correct answer encompasses all the listed options because the Environmental Protection Agency (EPA) has comprehensive authority to address pesticide risks to consumers. When the EPA identifies a pesticide that poses a risk, it can take a variety of actions to mitigate that risk, ensuring the safety of the public and the environment.

Requiring longer pre-harvest intervals allows for more time for pesticide residues to degrade before crops are harvested, thereby reducing the potential exposure to consumers. Setting restrictions on the frequency of application and rates further limits the amount of pesticide that can be used, which contributes to minimizing risk and potential health effects from overexposure.

In more severe cases, the EPA can cancel or suspend the use of a pesticide altogether. This action removes the pesticide from the marketplace if it's determined that its continued use poses an unacceptable risk to public health or the environment.

Therefore, D is correct because the EPA can implement all of these measures as part of its regulatory responsibilities to ensure consumer safety.