Which is the best statement about joint flexibility?

a.

it is constant for any joint type.

b.

it is constant within a family.

c.

it is consistent between an individual's joints.

d.

it varies from joint to joint.

Smoking damages the respiratory system by inhalation of a foreign substance, that is absorbed and residue is left behind on our lungs sponge like substance. the gas that is inhaled also increase your blood pressure and dilates your blood vessels. also the process of inhaling and exhaling the smoke it causes irritation to the throat and mouth. smoking can cause lung cancer and other respiratory and circulatory diseases. 

Good samaritan law protects civilians when they render aid to someone in need. 

It would be called procrastination. if i mark brainliest : d