Answer: (B) Opinion leader
Step-by-step explanation:
The opinion leader has the leadership quality and they influence the person attitude and the actions in an informally way. They can influence the people choices and also beliefs towards the various types of products, brands and the services.
Opinion leadership is one of the type of two step communication theory and it is basically proposed by Paul Lazarsfeld. According to the given question, Joe is known as opinion leader as he has technical properties for giving various types of knowledgeable suggestions.
Therefore, Option (B) is correct.