An advertiser who is selling computer monitors is writing new ad text for an existing ad group. Which line of ad text is written according to Google AdWords advertising policies?

An advertiser who is selling computer monitors is writing new ad text for an existing ad group. Which line of ad text is written according to Google AdWords advertising policies?

  A)  Cheap, cheap, cheap monitors
  B)  20-70% off LCD monitors
  C)  BUY affordable LCDs
  D)  **Free** shipping on LCDs