25 !
which blood vessels have thin, muscular walls and valves to prevent the backflow of blood?

a. veins
b. arterioles
c. capillaries
d. arteries

c would be the answer

absolute strength refers to the maximum force exerted by a body irrespective of body size. relative strength on the other hand is the force exerted by a body in relation to muscle size or body weight.

so the answer is: c. absolute strength measures strength regardless of your body size, while relative strength measures strength adjusted for your weight.