lAunCh sChEDulE24/5 - prEss ConFErEnCE.31/5 - tv ADvErtising stArts.DistriButE postErs.7/6 -DElivEr lEAFlEts. rADio ADvErtising stArts.14/6 - FrEE CompEtition stArts on thE rADio.how mAny writtEn Forms oF puBliCity ArE thErE
A、

A、two

B．

B、thrEE

C．

C、Four