Calgary has become one of Canada's key corporate headquarters, especially for the oil and gas industry. What businesses are headquartered in Calgary, and how does Calgary's easy access to mountain recreation?

a) Suncor Energy, Cenovus Energy, Encana; Attracts outdoor enthusiasts and tourism
b) Canadian Pacific Railway, Shaw Communications, Husky Energy; Enhances quality of life for residents
c) Enbridge, TransCanada, Talisman Energy; Provides recreational opportunities for employees
d) Imperial Oil, TransAlta, Cameco; Boosts tourism and promotes a healthy work-life balance