Several girls in the 9th grade class at a small private school maintained an online journal. In this journal, some negative comments about the school were made, and the principal made them discontinue this online journal. The principal was concerned because anybody can read these comments as long as they know the address. Personalized online journals where people and organizations can keep a running dialogue such as the one illustrated here are known as _____.
A. search engines
B. diaries
C. blogs
D. viral marketing sites
E. cyber diaries