Pals & Allies, Inc

Pals & Allies, Inc., sponsors QuikFlik, a social-networking, video-sharing site. Pals & Allies changes the terms of service on its site with thirty days' notice to its users. Rochelle and other users continue to use the site but nevertheless file a suit against its owner for breach of contract. If the court rules against the plaintiffs, it will most likely be because​

A) ​a change to terms of service is not a breach of contract.
B) ​the site belongs to Pals & Allies, not its users.
C) ​Pals & Allies set the original terms and can change them freely.
D) ​the plaintiffs continued to use the site after the thirty-day period.