Cigarette smoking primarily affects the

The lungs.

When you smoke, you inhale all of the toxic materials such as tobacco into your lungs. Eventually, smoking for long periods of time can cause lung deterioration, and can also spread to your blood which will cause other serious complications.

Aand b would both be correct

Depends on which disease, but as a general rule eat healthy. many vegetables.                                                        hope my answer has come to your . you for posting your question here in we hope to answer more of your questions and inquiries soon. have a nice day ahead! : )     (p.s mark as brainliest if )