Which of the Following Is a Feature of Naturally Occurring

Which of the following is a feature of naturally occurring food toxicants?

A) Lima beans contain deadly cyanide compounds.
B) The toxic solanine in potatoes is inactivated by cooking.
C) The toxic laetrile in certain fruit seeds is a moderately effective cancer treatment.
D) Mustard greens and radishes contain compounds that are known to worsen a cholesterol problem.
E) Even small amounts of goitrogen-containing vegetables can cause thyroid problems.