How do nicotine and tobacco cause cancer? by decreasing blood-sugar levels
by damaging or changing a cell's DNA
by increasing heart rate
by increasing phlegm and mucous productio

What a self improvement for a busy person who had difficulty finding time to exercise/ dropping out of clubs and activities/ refusing social invitations from friends/ scheduling daily invitation activity/ sleeping fewer hours at night

Aperson has had a good _ of life if they are still at the age of 95.

What are three cause of non-infection diseases?