Answer:
d) skin discoloration
Step-by-step explanation:
Smoking causes pre-mature aging, wrinkles, skin discoloration.
Cigarette smoke contains carbon monoxide and it displaces the oxygen in skin, while nicotine reduces blood flow. Nicotine leaves skin dry and sometimes even discolored. That's why consumers of cigarettes are advised to add extra supplements to their daily routine. For example vitamin C -- it helps protect and repair skin damage.