Which is a benefit of advertising online with Google AdWords?

147) Which is a benefit of advertising online with Google AdWords?

   A)  Advertisers can choose how much they spend and only pay when someone clicks their ad
   B)  Advertisers can choose how many times their ad should show during the day
   C)  Advertisers pay the same amount every time someone clicks their ad

   D)  Advertisers can pay to always show their ad above the organic search results