____ produce memory cells that trigger a stronger response to future exposures to the same antigen. 

Which of the following portable fire extinguishers is intended for use with Class K fixed systems or commercial kitchens that have deep fat fryers using vegetable or animal fats?

A. Water B. Foam C. Wet chemical D. Carbon dioxide

Licensure is:

A. a credential from a state agency or a professional association awarding permission to use a special professional title. B. appearing on a list of individuals on an official record who meet the qualifications for an occupation. C. a credential from a state agency awarding legal permission to practice. D. All of the above E. None of the above