Helen Loves Women's Volleyball

Multiple Choice

Helen loves women's volleyball.She played in high school and watches every college match.A lot of her friends expressed similar interests.Helen set up a network of more than a thousand students who were willing to get messages about the school's volleyball team and the volleyball program on their cellphones.The athletic program now pays Helen a small fee to place the team's schedule in her messages.Helen is engaged in ________.

A) blogging.
B) mobile commerce.
C) buzz management.
D) crowd sourcing.