Each campaign in your AdWords account should have a single:
maximum cost-per-click (max. CPC) bid
The correct answer is:
AdWords is a powerful online advertising tool, and there are lots of ways that you can use it to reach your goals. Depending on how you set up and run your campaign, you can set yourself up for success and use online advertising in a way that gets you maximum results.So as you approach creating advertising campaigns and start using AdWords, it’s important to plan out your online advertising goals and business
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