Each campaign in your AdWords account should have a single:
- A) maximum cost-per-click (max. CPC) bid
- B) landing page
- C) business goal
- D) ad group
Explanation: With AdWords, you’ll organize your account into separate campaigns, with each campaign focusing on a single business goal, such as driving traffic to your website, or offering a particular product or service. If your business serves several geographic areas, you might want to create a separate campaign for each location.
Read more here: https://support.google.com/partners/answer/6172648?hl=en