Which of the following is NOT a classification system?

The principle hormonal change that underlies chronic disease associated with stress is:

a. cortisone b. norepinephrine c. thyroxin d. ADH

Which of the following statements regarding structural integrity is MOST accurate?

A) Firefighters should never be positioned under burning concrete formwork. B) Steel-frame buildings are considered fire resistive while they are under construction. C) The ultimate fire resistance of concrete can be ensured as soon as the concrete hardens. D) A building designed to be fire resistive will have the structural integrity of a fire-resistive building throughout its construction.