Herbal Organics used actor and former NFL player Sweet Dave Brown to act as its spokesperson as the "Herbal Organics Man." It filmed humorous videos of the actor that went viral online. Herbal Organics saw sales of its deodorants increase substantially from the previous year. What type of competitive growth strategy did Herbal Organics use?

A. Product penetration
B. Market development
C. Diversification
D. Market penetration
E. Product development