Zimmer Centralpulse Is the World's Largest Producer of Replacement Hips

Zimmer Centralpulse is the world's largest producer of replacement hips and knees for orthopaedic surgery.
-Refer to Zimmer Centralpulse.The company is particularly interested in the market in southern British Columbia,where a large aging population lives.Which external environmental element most directly influences the continued growth of Zimmer Centralpulse?

A) economics
B) political
C) culture
D) demography