Which of the following statements are true? Select all that apply.

	A.	There have been several large scale incidents involving intentional contamination of the food supply
	B.	U.S agriculture and food systems have an extensive, open, interconnected, diverse, and complex structure
	C.	Protecting the nation’s food supply is uncomplicated
	D.	An attack on the U.S. agriculture and food system could have catastrophic health and economic effects