Which of the Following Is Not a True Statement

Multiple Choice

Which of the following is not a true statement?

A) If asbestos is found at surface, it is not considered harmful or dangerous to humans, plants, or animals
B) Radon gas is considered to be a radioactive carcinogen
C) Mercury is considered to be a toxic element
D) Arsenic is considered to be a toxic element
E) Lead is considered to be a toxic element