Why Does Cigarette Smoke Cause a Smoker's Skin to Wrinkle

Multiple Choice

Why does cigarette smoke cause a smoker's skin to wrinkle over time?

A) The fibroblast cells that secrete proteins to the skin are degraded.
B) The collagen and elastin matrix that holds skin to muscle is broken down.
C) The ground substance in skin is converted to protein fibers.
D) The nervous tissue that makes skin tighten is destroyed.