You are starting a new campaign with the goals of achieving a positive ROI and extending to all profitable traffic. How can the AdWords average daily budget setting help when starting out?

86) You are starting a new campaign with the goals of achieving a positive ROI and extending to all profitable traffic. How can the AdWords average daily budget setting help when starting out?

  A)  It can help direct traffic to different landing pages to discover which performs best
  B)  It can help aim for a desired average position during testing
  C)  It can help limit your costs and exposure while profitability is achieved

  D)  It can help limit exposure to only the geographical areas you support