Data shows that your client's ad that appears to people in San Francisco gets 120 conversions at a cost of US$1200 and cost-per-acquisition (CPA) of UD$10, while ads showing in Houston get 70 conversions at a cost of US$1400 and CPA of UD$20. If you have a CPA goal of US$12, what bid adjustment would you set for each location?

Data shows that your  client's ad that appears to people in San Francisco gets 120 conversions at a cost of US$1200 and cost-per-acquisition (CPA) of UD$10, while ads showing in Houston get 70 conversions at a cost of US$1400 and CPA of UD$20. If you have a CPA goal of US$12, what bid adjustment would you set for each location?
  A)  +40% for San Francisco, -20% for Houston
  B)  +40% for San Francisco, -40% for Houston
  C)  +20% for San Francisco, -20% for Houston
  D)  +20% for San Francisco, -40% for Houston