Dianne has just opened a new home goods retail store in her hometown. To announce her grand opening and invite customers to visit the new location and take advantage of opening-day sales, she created personalized mailers to send out to the local community. Which of the following is Dianne's strategy?
A. Prospecting
B. Consultative selling
C. Institutional advertising
D. Direct marketing
E. Product placement
Answer: D. Direct marketing