After quitting smoking. when does a persons body start to heal

When you stop smoking, your heart starts to rebound right away, but a full recovery can take as long as 15 years, a new study suggests.

Explanation:

When you quit smoking, your oxygen level normalizes within eight hours as your body slowly clears out the toxic level of carbon monoxide. 2. Your sense of smell and taste return to normal. You will start to recover your normal sense of smell and taste within 48 hours

Explanation:

i think the answer would be b.