Java Jacket Is a Company That Designs and Prints Ads

Java Jacket is a company that designs and prints ads on the paper sleeves that go around hot coffee cups sold in coffee shops.To find clients to advertise on the sleeves,the company sent a representative to companies such as Warner Brothers,eBay.com,and The Wall Street Journal to tell them how their ads on sleeves would give them inexpensive exposure to a large number of potential customers.How can Java Jacket's activities best be described?

A) as mass communication
B) as personal selling
C) as public relations
D) as implicit communication