An advertiser adds negative keywords to an ad group within a search campaign. This means that the ad will not show if the negative keywords

An advertiser adds negative keywords to an ad group within a search campaign. This means that the ad will not show if the negative keywords:
  A)  also appear in the ad text
  B)  have low maximum cost-per-click (CPC) bids
  C)  appear in another campaign within the account
  D)  appear in a users search query