Which of the Following Does Not Fall into the Category

Multiple Choice

Which of the following does not fall into the category of opinion leadership?

A) A classmate recommending a movie she saw last night.
B) A friend just returning from holiday with pictures recommends you use a polarising filter when taking photos for outdoor scenery.
C) A family decides to ask the neighbours who already have a swimming pool which company they should call to build one.
D) The local mobile phone store salesperson tells you about the latest model of Nokia phones they just shipped in.