Nicotine is an alkaloid compound that causes increase in blood pressure. Nicotine makes blood vessels narrow that leads to increase in pressure of walls of blood capillaries. It causes a rise in average blood pressure and faster heart beats.
A person with a family history of hypertension would avoid the smoking as nicotine present in cigarettes increases the blood pressure, which is dangerous.
Thus, the correct answer is 'option). nicotine increases blood volume to unsafe levels.'
