which of the following is NOT a promotion strategy or activity
(a) Buying keywords on search homepages which trigger clickable text boxes when the keywords are use in a search.
(b) Gaining the exclusive right to retail a company's products in a specific area for a specific period.
(c) Viral marketing, which facilitates and encourages people to pass along a marketing message about a particular product.
(d) Public relations efforts to establish and maintain a company's image.
