Alarge research trial using a supplement was stopped early due to evidence of possible harm.

a. beta carotene
b. ginkgo biloba
c. st. john's wort
d. none of these

Maybe meditation,stress relievers,try to have quite time try to get school done on time and try to go to bed earlier

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. 

Gwould be the correct answer

Wat r u trying to