Clients with knee or hip problems should not attempt to perform the back bend test. ____________________

What is the primary output device of a computer system, used to produce paper documents?

A) Scanner B) Monitor C) Mouse D) Printer

If a sufficient concentration of a hazardous material mixes with air and reaches its lower flammable limit:

A) the material can burn in the air or explode. B) the vapors will begin to burn, but will not explode. C) the chemical is said to have reached its flash point. D) there will not be enough oxygen to support combustion.