Question: Which source of traffic from social media is the most cost effective and why? A. Traffic that originates from advertising on social media platforms, because the company can strictly control the ad costs B. Traffic generate from content created by the company, because it doesn't cost them any more than their typical daily operating costs C. Traffic from email marketing campaigns, because email marketing is effective, inexpensive, and targeted D. Traffic from content created of shred by other social users, because it doesn't cost the company anything