In which part of the circulatory system does the exchange of oxygen and carbon dioxide take place between blood and cells?
a. veins
b. arteries
c. capillaries

The part of the circulatory system that does the exchange of oxygen and carbon dioxide take place between blood and cells are the capillaries. These are small vessels that connect the arteries and veins forming a network of capillary bed in different tissues. They are so small that red blood cells move into a single file.

the second one is wrong

explanation:

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.