________ Catheterization is used to collect a sterile urine specimen—the ideal urine specimen because it is free of contamination

What does the term "denominator" refer to?

A) The number by which a fraction is divided during reducing B) The number located on the top of a fraction C) The number of equal parts into which something is divided D) The number of parts of something that are being considered

_____ are thick walled and muscular, and usually carry oxygenated blood

a. Veins b. Valves c. Arteries d. Capillaries