During and After World War II, Todd Worked in an Asbestos

During and after World War II, Todd worked in an asbestos factory. His occupation is an example of an occupation that is:

A) in a sanitized environment subject to safety standards.
B) done in a disabling environment.
C) done without occupational safety standards.
D) considered a low-risk occupation.
E) only hazardous to people over the age of 50.